./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/rec_counter1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-numeric/rec_counter1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash de5b7f1cccf5c7fe435559014125bbfd73538586d5303d45f8d606cb31a4b74b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 09:02:22,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 09:02:22,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 09:02:22,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 09:02:22,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 09:02:22,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 09:02:22,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 09:02:22,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 09:02:22,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 09:02:22,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 09:02:22,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 09:02:22,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 09:02:22,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 09:02:22,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 09:02:22,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 09:02:22,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 09:02:22,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 09:02:22,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 09:02:22,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 09:02:22,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 09:02:22,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 09:02:22,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 09:02:22,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 09:02:22,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 09:02:22,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 09:02:22,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 09:02:22,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 09:02:22,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 09:02:22,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 09:02:22,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 09:02:22,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 09:02:22,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 09:02:22,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 09:02:22,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 09:02:22,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 09:02:22,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 09:02:22,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 09:02:22,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 09:02:22,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 09:02:22,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 09:02:22,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 09:02:22,063 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-16 09:02:22,082 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 09:02:22,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 09:02:22,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 09:02:22,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 09:02:22,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 09:02:22,086 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 09:02:22,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 09:02:22,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 09:02:22,086 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 09:02:22,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 09:02:22,087 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 09:02:22,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 09:02:22,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 09:02:22,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 09:02:22,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 09:02:22,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 09:02:22,088 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-16 09:02:22,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 09:02:22,088 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 09:02:22,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 09:02:22,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 09:02:22,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 09:02:22,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 09:02:22,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 09:02:22,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 09:02:22,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 09:02:22,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 09:02:22,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 09:02:22,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 09:02:22,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 09:02:22,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 09:02:22,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de5b7f1cccf5c7fe435559014125bbfd73538586d5303d45f8d606cb31a4b74b [2021-12-16 09:02:22,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 09:02:22,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 09:02:22,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 09:02:22,291 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 09:02:22,292 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 09:02:22,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/rec_counter1.c [2021-12-16 09:02:22,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7205913/52bfe1eb431340afbe5423c94abfd4bd/FLAG75d3ec754 [2021-12-16 09:02:22,706 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 09:02:22,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/rec_counter1.c [2021-12-16 09:02:22,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7205913/52bfe1eb431340afbe5423c94abfd4bd/FLAG75d3ec754 [2021-12-16 09:02:22,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7205913/52bfe1eb431340afbe5423c94abfd4bd [2021-12-16 09:02:22,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 09:02:22,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 09:02:22,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 09:02:22,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 09:02:22,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 09:02:22,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:02:22" (1/1) ... [2021-12-16 09:02:22,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33032cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22, skipping insertion in model container [2021-12-16 09:02:22,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:02:22" (1/1) ... [2021-12-16 09:02:22,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 09:02:22,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 09:02:22,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:02:22,852 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 09:02:22,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:02:22,869 INFO L208 MainTranslator]: Completed translation [2021-12-16 09:02:22,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22 WrapperNode [2021-12-16 09:02:22,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 09:02:22,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 09:02:22,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 09:02:22,871 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 09:02:22,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22" (1/1) ... [2021-12-16 09:02:22,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22" (1/1) ... [2021-12-16 09:02:22,889 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 12 [2021-12-16 09:02:22,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 09:02:22,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 09:02:22,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 09:02:22,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 09:02:22,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22" (1/1) ... [2021-12-16 09:02:22,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22" (1/1) ... [2021-12-16 09:02:22,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22" (1/1) ... [2021-12-16 09:02:22,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22" (1/1) ... [2021-12-16 09:02:22,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22" (1/1) ... [2021-12-16 09:02:22,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22" (1/1) ... [2021-12-16 09:02:22,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22" (1/1) ... [2021-12-16 09:02:22,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 09:02:22,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 09:02:22,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 09:02:22,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 09:02:22,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22" (1/1) ... [2021-12-16 09:02:22,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 09:02:22,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:22,928 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) [2021-12-16 09:02:22,937 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 [2021-12-16 09:02:22,958 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2021-12-16 09:02:22,959 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2021-12-16 09:02:22,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 09:02:22,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 09:02:22,989 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 09:02:22,990 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 09:02:23,086 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 09:02:23,091 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 09:02:23,091 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 09:02:23,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:02:23 BoogieIcfgContainer [2021-12-16 09:02:23,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 09:02:23,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 09:02:23,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 09:02:23,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 09:02:23,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 09:02:22" (1/3) ... [2021-12-16 09:02:23,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f5ef8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:02:23, skipping insertion in model container [2021-12-16 09:02:23,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:02:22" (2/3) ... [2021-12-16 09:02:23,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f5ef8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:02:23, skipping insertion in model container [2021-12-16 09:02:23,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:02:23" (3/3) ... [2021-12-16 09:02:23,109 INFO L111 eAbstractionObserver]: Analyzing ICFG rec_counter1.c [2021-12-16 09:02:23,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 09:02:23,112 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-12-16 09:02:23,157 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 09:02:23,166 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 [2021-12-16 09:02:23,167 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-12-16 09:02:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.588235294117647) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 09:02:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 09:02:23,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:23,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:23,188 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:23,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1088965814, now seen corresponding path program 1 times [2021-12-16 09:02:23,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:23,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897104918] [2021-12-16 09:02:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:23,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:23,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:23,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897104918] [2021-12-16 09:02:23,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897104918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:02:23,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:02:23,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 09:02:23,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922662257] [2021-12-16 09:02:23,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:02:23,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:02:23,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:02:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:02:23,313 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.588235294117647) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-16 09:02:23,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:23,365 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-12-16 09:02:23,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 09:02:23,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2021-12-16 09:02:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:23,371 INFO L225 Difference]: With dead ends: 43 [2021-12-16 09:02:23,371 INFO L226 Difference]: Without dead ends: 22 [2021-12-16 09:02:23,373 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 [2021-12-16 09:02:23,375 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:23,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 44 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:02:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-16 09:02:23,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-16 09:02:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 09:02:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-16 09:02:23,397 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 7 [2021-12-16 09:02:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:23,398 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-16 09:02:23,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-16 09:02:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-16 09:02:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 09:02:23,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:23,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:23,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 09:02:23,399 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:23,399 INFO L85 PathProgramCache]: Analyzing trace with hash -601798096, now seen corresponding path program 1 times [2021-12-16 09:02:23,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:23,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573389580] [2021-12-16 09:02:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:23,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:23,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:23,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573389580] [2021-12-16 09:02:23,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573389580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:02:23,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:02:23,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 09:02:23,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234378421] [2021-12-16 09:02:23,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:02:23,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:02:23,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:23,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:02:23,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:02:23,426 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. 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) [2021-12-16 09:02:23,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:23,466 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-12-16 09:02:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 09:02:23,467 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 [2021-12-16 09:02:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:23,468 INFO L225 Difference]: With dead ends: 42 [2021-12-16 09:02:23,469 INFO L226 Difference]: Without dead ends: 37 [2021-12-16 09:02:23,469 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 [2021-12-16 09:02:23,474 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:23,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 79 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:02:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-16 09:02:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-12-16 09:02:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 09:02:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-12-16 09:02:23,486 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 8 [2021-12-16 09:02:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:23,486 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-12-16 09:02:23,487 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) [2021-12-16 09:02:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-12-16 09:02:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 09:02:23,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:23,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:23,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 09:02:23,489 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash 758423009, now seen corresponding path program 1 times [2021-12-16 09:02:23,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:23,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454011626] [2021-12-16 09:02:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:23,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:23,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:23,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454011626] [2021-12-16 09:02:23,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454011626] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:23,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615075234] [2021-12-16 09:02:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:23,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:23,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:23,592 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) [2021-12-16 09:02:23,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 09:02:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:23,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 09:02:23,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:23,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:02:23,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615075234] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:23,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:23,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-16 09:02:23,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587436581] [2021-12-16 09:02:23,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:23,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 09:02:23,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:23,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 09:02:23,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-16 09:02:23,780 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:02:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:23,842 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-12-16 09:02:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 09:02:23,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 09:02:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:23,844 INFO L225 Difference]: With dead ends: 39 [2021-12-16 09:02:23,844 INFO L226 Difference]: Without dead ends: 38 [2021-12-16 09:02:23,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-12-16 09:02:23,847 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:23,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 72 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:02:23,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-16 09:02:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-12-16 09:02:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 09:02:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-16 09:02:23,866 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 13 [2021-12-16 09:02:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:23,866 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-16 09:02:23,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:02:23,867 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-16 09:02:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 09:02:23,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:23,868 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:23,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:24,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:24,070 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:24,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1647452250, now seen corresponding path program 1 times [2021-12-16 09:02:24,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:24,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904546516] [2021-12-16 09:02:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:24,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 09:02:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 09:02:24,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:24,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904546516] [2021-12-16 09:02:24,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904546516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:02:24,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:02:24,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 09:02:24,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6774537] [2021-12-16 09:02:24,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:02:24,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 09:02:24,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:24,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 09:02:24,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 09:02:24,118 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 09:02:24,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:24,134 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-12-16 09:02:24,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 09:02:24,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 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 [2021-12-16 09:02:24,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:24,135 INFO L225 Difference]: With dead ends: 48 [2021-12-16 09:02:24,135 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 09:02:24,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:02:24,136 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:24,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 54 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:02:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 09:02:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-12-16 09:02:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 31 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 09:02:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-12-16 09:02:24,140 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 16 [2021-12-16 09:02:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:24,141 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-12-16 09:02:24,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 09:02:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-12-16 09:02:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 09:02:24,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:24,142 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:24,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 09:02:24,142 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1647452195, now seen corresponding path program 1 times [2021-12-16 09:02:24,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:24,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48881866] [2021-12-16 09:02:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:24,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 09:02:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 09:02:24,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:24,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48881866] [2021-12-16 09:02:24,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48881866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:02:24,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:02:24,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 09:02:24,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267265504] [2021-12-16 09:02:24,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:02:24,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 09:02:24,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 09:02:24,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:02:24,183 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 09:02:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:24,197 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2021-12-16 09:02:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 09:02:24,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 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 [2021-12-16 09:02:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:24,198 INFO L225 Difference]: With dead ends: 64 [2021-12-16 09:02:24,198 INFO L226 Difference]: Without dead ends: 42 [2021-12-16 09:02:24,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:02:24,199 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:24,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:02:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-16 09:02:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-16 09:02:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 09:02:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2021-12-16 09:02:24,207 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 16 [2021-12-16 09:02:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:24,207 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2021-12-16 09:02:24,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 09:02:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2021-12-16 09:02:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 09:02:24,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:24,208 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:24,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 09:02:24,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:24,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash 468587862, now seen corresponding path program 1 times [2021-12-16 09:02:24,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:24,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925972630] [2021-12-16 09:02:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:24,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 09:02:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 09:02:24,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:24,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925972630] [2021-12-16 09:02:24,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925972630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:02:24,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:02:24,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 09:02:24,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772423744] [2021-12-16 09:02:24,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:02:24,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 09:02:24,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:24,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 09:02:24,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 09:02:24,238 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 09:02:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:24,247 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-16 09:02:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 09:02:24,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 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 17 [2021-12-16 09:02:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:24,248 INFO L225 Difference]: With dead ends: 42 [2021-12-16 09:02:24,248 INFO L226 Difference]: Without dead ends: 37 [2021-12-16 09:02:24,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 09:02:24,250 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:24,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:02:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-16 09:02:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-16 09:02:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 31 states have internal predecessors, (38), 3 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) [2021-12-16 09:02:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-12-16 09:02:24,256 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 17 [2021-12-16 09:02:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:24,256 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-12-16 09:02:24,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 09:02:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-12-16 09:02:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-16 09:02:24,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:24,256 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:24,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 09:02:24,257 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:24,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1288772758, now seen corresponding path program 1 times [2021-12-16 09:02:24,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:24,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247855672] [2021-12-16 09:02:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:24,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 09:02:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 09:02:24,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:24,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247855672] [2021-12-16 09:02:24,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247855672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:24,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032957526] [2021-12-16 09:02:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:24,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:24,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:24,331 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) [2021-12-16 09:02:24,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 09:02:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 09:02:24,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 09:02:24,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 09:02:24,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032957526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:02:24,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 09:02:24,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2021-12-16 09:02:24,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647961952] [2021-12-16 09:02:24,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:02:24,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 09:02:24,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:24,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 09:02:24,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-16 09:02:24,456 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 09:02:24,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:24,491 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-12-16 09:02:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 09:02:24,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 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 27 [2021-12-16 09:02:24,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:24,493 INFO L225 Difference]: With dead ends: 37 [2021-12-16 09:02:24,493 INFO L226 Difference]: Without dead ends: 36 [2021-12-16 09:02:24,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-16 09:02:24,493 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:24,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:02:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-16 09:02:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-16 09:02:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 3 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) [2021-12-16 09:02:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-16 09:02:24,497 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 27 [2021-12-16 09:02:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:24,497 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-16 09:02:24,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 09:02:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-16 09:02:24,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 09:02:24,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:24,497 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:24,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:24,715 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,SelfDestructingSolverStorable6 [2021-12-16 09:02:24,716 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:24,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:24,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1297249887, now seen corresponding path program 1 times [2021-12-16 09:02:24,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:24,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970039392] [2021-12-16 09:02:24,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:24,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 09:02:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 09:02:24,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:24,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970039392] [2021-12-16 09:02:24,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970039392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:02:24,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 09:02:24,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 09:02:24,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171957653] [2021-12-16 09:02:24,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:02:24,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 09:02:24,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:24,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 09:02:24,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 09:02:24,746 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 09:02:24,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:24,750 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-12-16 09:02:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 09:02:24,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 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 28 [2021-12-16 09:02:24,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:24,751 INFO L225 Difference]: With dead ends: 36 [2021-12-16 09:02:24,751 INFO L226 Difference]: Without dead ends: 35 [2021-12-16 09:02:24,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 09:02:24,751 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:24,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:02:24,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-16 09:02:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-16 09:02:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 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) [2021-12-16 09:02:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-12-16 09:02:24,756 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 28 [2021-12-16 09:02:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:24,756 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-12-16 09:02:24,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 09:02:24,756 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-12-16 09:02:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 09:02:24,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:24,756 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:24,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 09:02:24,757 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:24,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1116627082, now seen corresponding path program 1 times [2021-12-16 09:02:24,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:24,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692166492] [2021-12-16 09:02:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:24,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 09:02:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 09:02:24,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:24,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692166492] [2021-12-16 09:02:24,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692166492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:24,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092131543] [2021-12-16 09:02:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:24,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:24,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:24,804 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) [2021-12-16 09:02:24,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 09:02:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:24,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 09:02:24,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 09:02:24,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 09:02:24,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092131543] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:24,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:24,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-16 09:02:24,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857696808] [2021-12-16 09:02:24,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:24,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 09:02:24,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:24,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 09:02:24,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-16 09:02:24,999 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 09:02:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:25,090 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2021-12-16 09:02:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-16 09:02:25,090 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-12-16 09:02:25,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:25,091 INFO L225 Difference]: With dead ends: 78 [2021-12-16 09:02:25,091 INFO L226 Difference]: Without dead ends: 63 [2021-12-16 09:02:25,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-12-16 09:02:25,094 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:25,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 120 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 09:02:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-16 09:02:25,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2021-12-16 09:02:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 09:02:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-16 09:02:25,102 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 30 [2021-12-16 09:02:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:25,102 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-16 09:02:25,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 09:02:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-16 09:02:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 09:02:25,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:25,103 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:25,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:25,319 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 [2021-12-16 09:02:25,319 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:25,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:25,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1143138410, now seen corresponding path program 2 times [2021-12-16 09:02:25,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:25,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185833174] [2021-12-16 09:02:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:25,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:25,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 09:02:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:25,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:25,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:25,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 32 proven. 19 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-16 09:02:25,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185833174] [2021-12-16 09:02:25,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185833174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862437328] [2021-12-16 09:02:25,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:02:25,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:25,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:25,467 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) [2021-12-16 09:02:25,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 09:02:25,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:02:25,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:25,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 09:02:25,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 41 proven. 8 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-16 09:02:25,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 42 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-16 09:02:25,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862437328] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:25,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:25,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 15 [2021-12-16 09:02:25,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462379949] [2021-12-16 09:02:25,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:25,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 09:02:25,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 09:02:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-16 09:02:25,742 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-16 09:02:25,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:25,867 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2021-12-16 09:02:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 09:02:25,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2021-12-16 09:02:25,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:25,868 INFO L225 Difference]: With dead ends: 99 [2021-12-16 09:02:25,868 INFO L226 Difference]: Without dead ends: 64 [2021-12-16 09:02:25,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-12-16 09:02:25,869 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:25,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 213 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 09:02:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-16 09:02:25,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-12-16 09:02:25,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 09:02:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-16 09:02:25,873 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 68 [2021-12-16 09:02:25,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:25,873 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-16 09:02:25,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-16 09:02:25,873 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-16 09:02:25,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-16 09:02:25,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:25,874 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:25,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:26,075 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 [2021-12-16 09:02:26,075 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash 883326234, now seen corresponding path program 3 times [2021-12-16 09:02:26,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:26,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301873948] [2021-12-16 09:02:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:26,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:26,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 09:02:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:26,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:26,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:26,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-16 09:02:26,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301873948] [2021-12-16 09:02:26,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301873948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181792588] [2021-12-16 09:02:26,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 09:02:26,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:26,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:26,195 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) [2021-12-16 09:02:26,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 09:02:26,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 09:02:26,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:26,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 09:02:26,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-16 09:02:26,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-16 09:02:26,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181792588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:26,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:26,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 24 [2021-12-16 09:02:26,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155112089] [2021-12-16 09:02:26,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:26,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 09:02:26,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:26,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 09:02:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-12-16 09:02:26,540 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-16 09:02:26,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:26,762 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2021-12-16 09:02:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-16 09:02:26,763 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 74 [2021-12-16 09:02:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:26,767 INFO L225 Difference]: With dead ends: 115 [2021-12-16 09:02:26,767 INFO L226 Difference]: Without dead ends: 100 [2021-12-16 09:02:26,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=1559, Unknown=0, NotChecked=0, Total=2070 [2021-12-16 09:02:26,768 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 148 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:26,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 135 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 09:02:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-16 09:02:26,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-12-16 09:02:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.127906976744186) internal successors, (97), 86 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 09:02:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-12-16 09:02:26,774 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 74 [2021-12-16 09:02:26,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:26,774 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-12-16 09:02:26,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-16 09:02:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-12-16 09:02:26,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 09:02:26,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:26,775 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 7, 7, 7, 7, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:26,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:26,998 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 [2021-12-16 09:02:26,998 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:26,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:26,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1187497949, now seen corresponding path program 4 times [2021-12-16 09:02:26,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:26,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982917956] [2021-12-16 09:02:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:26,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:27,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 09:02:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:27,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:27,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:27,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:27,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-16 09:02:27,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:27,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982917956] [2021-12-16 09:02:27,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982917956] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:27,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739248209] [2021-12-16 09:02:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 09:02:27,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:27,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:27,162 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) [2021-12-16 09:02:27,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 09:02:27,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 09:02:27,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:27,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 09:02:27,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 12 proven. 211 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-16 09:02:27,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 12 proven. 211 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-16 09:02:27,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739248209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:27,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:27,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 32 [2021-12-16 09:02:27,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515775891] [2021-12-16 09:02:27,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:27,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 09:02:27,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:27,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 09:02:27,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 09:02:27,957 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 33 states, 32 states have (on average 2.65625) internal successors, (85), 24 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 09:02:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:28,175 INFO L93 Difference]: Finished difference Result 388 states and 445 transitions. [2021-12-16 09:02:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-16 09:02:28,175 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.65625) internal successors, (85), 24 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 103 [2021-12-16 09:02:28,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:28,177 INFO L225 Difference]: With dead ends: 388 [2021-12-16 09:02:28,177 INFO L226 Difference]: Without dead ends: 297 [2021-12-16 09:02:28,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=572, Invalid=2290, Unknown=0, NotChecked=0, Total=2862 [2021-12-16 09:02:28,179 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 115 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:28,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 235 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 09:02:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-16 09:02:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 155. [2021-12-16 09:02:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 141 states have internal predecessors, (157), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 11 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 09:02:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2021-12-16 09:02:28,201 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 103 [2021-12-16 09:02:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:28,201 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2021-12-16 09:02:28,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.65625) internal successors, (85), 24 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 09:02:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2021-12-16 09:02:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-16 09:02:28,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:28,203 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 13, 12, 12, 12, 12, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:28,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:28,419 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 [2021-12-16 09:02:28,419 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:28,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:28,420 INFO L85 PathProgramCache]: Analyzing trace with hash -276321318, now seen corresponding path program 5 times [2021-12-16 09:02:28,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:28,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527419770] [2021-12-16 09:02:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:28,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 09:02:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 697 proven. 26 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2021-12-16 09:02:28,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:28,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527419770] [2021-12-16 09:02:28,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527419770] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:28,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484537397] [2021-12-16 09:02:28,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 09:02:28,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:28,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:28,647 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) [2021-12-16 09:02:28,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 09:02:28,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-16 09:02:28,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:28,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 09:02:28,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 509 proven. 26 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2021-12-16 09:02:28,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 513 proven. 22 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2021-12-16 09:02:29,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484537397] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:29,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:29,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2021-12-16 09:02:29,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513646252] [2021-12-16 09:02:29,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:29,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 09:02:29,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 09:02:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-16 09:02:29,365 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 09:02:29,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:29,510 INFO L93 Difference]: Finished difference Result 301 states and 337 transitions. [2021-12-16 09:02:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 09:02:29,510 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 188 [2021-12-16 09:02:29,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:29,511 INFO L225 Difference]: With dead ends: 301 [2021-12-16 09:02:29,511 INFO L226 Difference]: Without dead ends: 185 [2021-12-16 09:02:29,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 394 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-12-16 09:02:29,512 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:29,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 159 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 09:02:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-16 09:02:29,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2021-12-16 09:02:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 166 states have internal predecessors, (181), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-16 09:02:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 196 transitions. [2021-12-16 09:02:29,534 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 196 transitions. Word has length 188 [2021-12-16 09:02:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:29,535 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 196 transitions. [2021-12-16 09:02:29,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 09:02:29,536 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 196 transitions. [2021-12-16 09:02:29,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-16 09:02:29,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:29,538 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 13, 12, 12, 12, 12, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:29,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:29,747 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 [2021-12-16 09:02:29,747 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:29,748 INFO L85 PathProgramCache]: Analyzing trace with hash -264955121, now seen corresponding path program 6 times [2021-12-16 09:02:29,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:29,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101146947] [2021-12-16 09:02:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:29,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:29,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 09:02:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:29,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:29,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:29,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:29,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:29,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:29,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:29,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:29,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:29,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 840 proven. 53 refuted. 0 times theorem prover too weak. 957 trivial. 0 not checked. [2021-12-16 09:02:29,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:29,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101146947] [2021-12-16 09:02:29,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101146947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:29,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777319146] [2021-12-16 09:02:29,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 09:02:29,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:29,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:29,974 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) [2021-12-16 09:02:29,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 09:02:30,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-16 09:02:30,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:30,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 09:02:30,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 599 proven. 67 refuted. 0 times theorem prover too weak. 1184 trivial. 0 not checked. [2021-12-16 09:02:30,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 599 proven. 67 refuted. 0 times theorem prover too weak. 1184 trivial. 0 not checked. [2021-12-16 09:02:30,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777319146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:30,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:30,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 39 [2021-12-16 09:02:30,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648748809] [2021-12-16 09:02:30,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:30,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-16 09:02:30,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:30,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-16 09:02:30,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 09:02:30,952 INFO L87 Difference]: Start difference. First operand 181 states and 196 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 36 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-16 09:02:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:32,233 INFO L93 Difference]: Finished difference Result 739 states and 849 transitions. [2021-12-16 09:02:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-16 09:02:32,233 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 36 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 203 [2021-12-16 09:02:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:32,235 INFO L225 Difference]: With dead ends: 739 [2021-12-16 09:02:32,235 INFO L226 Difference]: Without dead ends: 583 [2021-12-16 09:02:32,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1535, Invalid=8167, Unknown=0, NotChecked=0, Total=9702 [2021-12-16 09:02:32,238 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 353 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:32,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 322 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 09:02:32,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-12-16 09:02:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 243. [2021-12-16 09:02:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 226 states have (on average 1.092920353982301) internal successors, (247), 226 states have internal predecessors, (247), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 14 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-16 09:02:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 264 transitions. [2021-12-16 09:02:32,249 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 264 transitions. Word has length 203 [2021-12-16 09:02:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:32,250 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 264 transitions. [2021-12-16 09:02:32,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 36 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-16 09:02:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 264 transitions. [2021-12-16 09:02:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-16 09:02:32,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:32,252 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 13, 12, 12, 12, 12, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:32,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:32,463 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 [2021-12-16 09:02:32,463 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash 352475471, now seen corresponding path program 7 times [2021-12-16 09:02:32,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:32,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735755000] [2021-12-16 09:02:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:32,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:32,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 09:02:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:32,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:32,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:32,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:32,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:32,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:32,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:32,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:32,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:32,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2865 backedges. 1648 proven. 89 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2021-12-16 09:02:32,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:32,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735755000] [2021-12-16 09:02:32,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735755000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:32,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488808115] [2021-12-16 09:02:32,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 09:02:32,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:32,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:32,777 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) [2021-12-16 09:02:32,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 09:02:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:32,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 09:02:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2865 backedges. 1463 proven. 185 refuted. 0 times theorem prover too weak. 1217 trivial. 0 not checked. [2021-12-16 09:02:33,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2865 backedges. 1476 proven. 172 refuted. 0 times theorem prover too weak. 1217 trivial. 0 not checked. [2021-12-16 09:02:34,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488808115] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:34,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:34,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 31 [2021-12-16 09:02:34,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74987976] [2021-12-16 09:02:34,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:34,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-16 09:02:34,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:34,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-16 09:02:34,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-12-16 09:02:34,564 INFO L87 Difference]: Start difference. First operand 243 states and 264 transitions. Second operand has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 27 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 09:02:35,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:35,225 INFO L93 Difference]: Finished difference Result 499 states and 544 transitions. [2021-12-16 09:02:35,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-16 09:02:35,225 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 27 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 233 [2021-12-16 09:02:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:35,227 INFO L225 Difference]: With dead ends: 499 [2021-12-16 09:02:35,227 INFO L226 Difference]: Without dead ends: 329 [2021-12-16 09:02:35,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 476 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=734, Invalid=3556, Unknown=0, NotChecked=0, Total=4290 [2021-12-16 09:02:35,230 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:35,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 284 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 09:02:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-16 09:02:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 299. [2021-12-16 09:02:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 279 states have (on average 1.0788530465949822) internal successors, (301), 279 states have internal predecessors, (301), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-16 09:02:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 321 transitions. [2021-12-16 09:02:35,243 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 321 transitions. Word has length 233 [2021-12-16 09:02:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:35,244 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 321 transitions. [2021-12-16 09:02:35,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 27 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 09:02:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 321 transitions. [2021-12-16 09:02:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-16 09:02:35,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:35,246 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:35,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:35,451 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 [2021-12-16 09:02:35,451 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1653165142, now seen corresponding path program 8 times [2021-12-16 09:02:35,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:35,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462072174] [2021-12-16 09:02:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:35,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:35,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 09:02:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:35,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:35,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:35,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:35,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:35,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:35,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:35,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:35,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:35,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3119 backedges. 1918 proven. 134 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2021-12-16 09:02:35,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:35,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462072174] [2021-12-16 09:02:35,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462072174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:35,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365738182] [2021-12-16 09:02:35,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:02:35,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:35,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:35,810 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) [2021-12-16 09:02:35,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 09:02:35,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:02:35,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:35,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-16 09:02:35,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3119 backedges. 1882 proven. 324 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2021-12-16 09:02:36,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3119 backedges. 1901 proven. 305 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2021-12-16 09:02:37,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365738182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:37,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:37,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 38 [2021-12-16 09:02:37,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350471539] [2021-12-16 09:02:37,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:37,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-16 09:02:37,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:37,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-16 09:02:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 09:02:37,921 INFO L87 Difference]: Start difference. First operand 299 states and 321 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 33 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 09:02:39,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:39,060 INFO L93 Difference]: Finished difference Result 616 states and 661 transitions. [2021-12-16 09:02:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-16 09:02:39,060 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 33 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) Word has length 232 [2021-12-16 09:02:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:39,062 INFO L225 Difference]: With dead ends: 616 [2021-12-16 09:02:39,062 INFO L226 Difference]: Without dead ends: 431 [2021-12-16 09:02:39,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 471 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1214, Invalid=6268, Unknown=0, NotChecked=0, Total=7482 [2021-12-16 09:02:39,064 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:39,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 428 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 09:02:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-16 09:02:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 379. [2021-12-16 09:02:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 355 states have (on average 1.0676056338028168) internal successors, (379), 355 states have internal predecessors, (379), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 21 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 09:02:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 403 transitions. [2021-12-16 09:02:39,079 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 403 transitions. Word has length 232 [2021-12-16 09:02:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:39,080 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 403 transitions. [2021-12-16 09:02:39,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 33 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 09:02:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 403 transitions. [2021-12-16 09:02:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-16 09:02:39,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:39,082 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:39,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:39,298 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 [2021-12-16 09:02:39,299 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash 756753498, now seen corresponding path program 9 times [2021-12-16 09:02:39,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:39,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901579480] [2021-12-16 09:02:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:39,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:39,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 09:02:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:39,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:39,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:39,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:39,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:39,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:39,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:39,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:39,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:39,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 2137 proven. 559 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-12-16 09:02:39,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:39,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901579480] [2021-12-16 09:02:39,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901579480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:39,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357608695] [2021-12-16 09:02:39,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 09:02:39,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:39,841 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) [2021-12-16 09:02:39,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 09:02:39,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-16 09:02:39,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:39,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 09:02:39,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 829 proven. 70 refuted. 0 times theorem prover too weak. 2477 trivial. 0 not checked. [2021-12-16 09:02:40,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3376 backedges. 829 proven. 70 refuted. 0 times theorem prover too weak. 2477 trivial. 0 not checked. [2021-12-16 09:02:41,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357608695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:41,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:41,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 17, 17] total 70 [2021-12-16 09:02:41,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938957026] [2021-12-16 09:02:41,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:41,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-16 09:02:41,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:41,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-16 09:02:41,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=4292, Unknown=0, NotChecked=0, Total=4830 [2021-12-16 09:02:41,251 INFO L87 Difference]: Start difference. First operand 379 states and 403 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 62 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 09:02:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:48,005 INFO L93 Difference]: Finished difference Result 875 states and 1000 transitions. [2021-12-16 09:02:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 278 states. [2021-12-16 09:02:48,006 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 62 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 238 [2021-12-16 09:02:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:48,010 INFO L225 Difference]: With dead ends: 875 [2021-12-16 09:02:48,010 INFO L226 Difference]: Without dead ends: 793 [2021-12-16 09:02:48,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37851 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=17777, Invalid=91453, Unknown=0, NotChecked=0, Total=109230 [2021-12-16 09:02:48,021 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 403 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:48,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 481 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 09:02:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-12-16 09:02:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 430. [2021-12-16 09:02:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 406 states have (on average 1.0738916256157636) internal successors, (436), 406 states have internal predecessors, (436), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 21 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 09:02:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 460 transitions. [2021-12-16 09:02:48,045 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 460 transitions. Word has length 238 [2021-12-16 09:02:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:48,046 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 460 transitions. [2021-12-16 09:02:48,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 62 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 09:02:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 460 transitions. [2021-12-16 09:02:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-16 09:02:48,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:48,048 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:48,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:48,255 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 [2021-12-16 09:02:48,255 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2139325743, now seen corresponding path program 10 times [2021-12-16 09:02:48,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:48,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435828891] [2021-12-16 09:02:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:48,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:48,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 09:02:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:48,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:48,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:48,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:48,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:48,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:48,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:48,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:48,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:48,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 3086 proven. 823 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2021-12-16 09:02:48,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:48,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435828891] [2021-12-16 09:02:48,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435828891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:48,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305640807] [2021-12-16 09:02:48,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 09:02:48,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:48,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:48,855 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) [2021-12-16 09:02:48,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 09:02:49,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 09:02:49,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:49,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-16 09:02:49,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 3131 proven. 776 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2021-12-16 09:02:49,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 3165 proven. 742 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2021-12-16 09:02:51,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305640807] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:51,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:51,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 39, 39] total 45 [2021-12-16 09:02:51,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435581143] [2021-12-16 09:02:51,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:51,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-16 09:02:51,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-16 09:02:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1759, Unknown=0, NotChecked=0, Total=1980 [2021-12-16 09:02:51,561 INFO L87 Difference]: Start difference. First operand 430 states and 460 transitions. Second operand has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 36 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-16 09:02:52,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:52,959 INFO L93 Difference]: Finished difference Result 568 states and 610 transitions. [2021-12-16 09:02:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-16 09:02:52,959 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 36 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 265 [2021-12-16 09:02:52,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:52,961 INFO L225 Difference]: With dead ends: 568 [2021-12-16 09:02:52,961 INFO L226 Difference]: Without dead ends: 467 [2021-12-16 09:02:52,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 549 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2750 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2083, Invalid=11027, Unknown=0, NotChecked=0, Total=13110 [2021-12-16 09:02:52,963 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:52,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 654 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 09:02:52,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-16 09:02:52,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 433. [2021-12-16 09:02:52,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 409 states have (on average 1.0709046454767726) internal successors, (438), 409 states have internal predecessors, (438), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 21 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-16 09:02:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 462 transitions. [2021-12-16 09:02:52,980 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 462 transitions. Word has length 265 [2021-12-16 09:02:52,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:52,980 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 462 transitions. [2021-12-16 09:02:52,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.488888888888889) internal successors, (112), 36 states have internal predecessors, (112), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-16 09:02:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 462 transitions. [2021-12-16 09:02:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-12-16 09:02:52,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:52,982 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:53,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:53,195 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 [2021-12-16 09:02:53,195 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:53,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1037648150, now seen corresponding path program 11 times [2021-12-16 09:02:53,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:53,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723463417] [2021-12-16 09:02:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:53,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:53,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 09:02:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:53,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:53,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:53,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:53,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:53,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:53,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:53,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:53,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:53,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4841 backedges. 0 proven. 3978 refuted. 0 times theorem prover too weak. 863 trivial. 0 not checked. [2021-12-16 09:02:53,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:53,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723463417] [2021-12-16 09:02:53,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723463417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:53,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912075457] [2021-12-16 09:02:53,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 09:02:53,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:53,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:53,636 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) [2021-12-16 09:02:53,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 09:02:53,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-16 09:02:53,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:02:53,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 09:02:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:02:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4841 backedges. 1809 proven. 330 refuted. 0 times theorem prover too weak. 2702 trivial. 0 not checked. [2021-12-16 09:02:54,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:02:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4841 backedges. 1809 proven. 330 refuted. 0 times theorem prover too weak. 2702 trivial. 0 not checked. [2021-12-16 09:02:55,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912075457] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:02:55,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:02:55,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 33] total 95 [2021-12-16 09:02:55,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849794001] [2021-12-16 09:02:55,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:02:55,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-16 09:02:55,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:02:55,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-16 09:02:56,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1648, Invalid=7472, Unknown=0, NotChecked=0, Total=9120 [2021-12-16 09:02:56,000 INFO L87 Difference]: Start difference. First operand 433 states and 462 transitions. Second operand has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 86 states have internal predecessors, (189), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-16 09:02:59,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:02:59,077 INFO L93 Difference]: Finished difference Result 694 states and 774 transitions. [2021-12-16 09:02:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-12-16 09:02:59,078 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 86 states have internal predecessors, (189), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 268 [2021-12-16 09:02:59,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:02:59,080 INFO L225 Difference]: With dead ends: 694 [2021-12-16 09:02:59,081 INFO L226 Difference]: Without dead ends: 643 [2021-12-16 09:02:59,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20707 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=15924, Invalid=41916, Unknown=0, NotChecked=0, Total=57840 [2021-12-16 09:02:59,086 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1298 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 09:02:59,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1298 Valid, 242 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 09:02:59,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-12-16 09:02:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 562. [2021-12-16 09:02:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 537 states have (on average 1.0875232774674115) internal successors, (584), 537 states have internal predecessors, (584), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-16 09:02:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 609 transitions. [2021-12-16 09:02:59,115 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 609 transitions. Word has length 268 [2021-12-16 09:02:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:02:59,115 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 609 transitions. [2021-12-16 09:02:59,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 86 states have internal predecessors, (189), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-16 09:02:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 609 transitions. [2021-12-16 09:02:59,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-12-16 09:02:59,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:02:59,118 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 14, 13, 13, 13, 13, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-16 09:02:59,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 09:02:59,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:59,329 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:02:59,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:02:59,329 INFO L85 PathProgramCache]: Analyzing trace with hash 866252902, now seen corresponding path program 12 times [2021-12-16 09:02:59,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:02:59,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891836212] [2021-12-16 09:02:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:02:59,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:02:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:59,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 09:02:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:59,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:59,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:59,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:59,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:59,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:59,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:59,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:59,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:59,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:59,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:02:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:02:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10122 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 2247 trivial. 0 not checked. [2021-12-16 09:02:59,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:02:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891836212] [2021-12-16 09:02:59,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891836212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:02:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000247931] [2021-12-16 09:02:59,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 09:02:59,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:02:59,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:02:59,920 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:02:59,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 09:03:00,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-16 09:03:00,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:03:00,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 09:03:00,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:03:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10122 backedges. 4618 proven. 1995 refuted. 0 times theorem prover too weak. 3509 trivial. 0 not checked. [2021-12-16 09:03:00,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:03:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10122 backedges. 4618 proven. 1995 refuted. 0 times theorem prover too weak. 3509 trivial. 0 not checked. [2021-12-16 09:03:02,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000247931] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:03:02,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:03:02,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 25, 25] total 75 [2021-12-16 09:03:02,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124576836] [2021-12-16 09:03:02,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:03:02,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-16 09:03:02,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:03:02,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-16 09:03:02,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=873, Invalid=4827, Unknown=0, NotChecked=0, Total=5700 [2021-12-16 09:03:02,163 INFO L87 Difference]: Start difference. First operand 562 states and 609 transitions. Second operand has 76 states, 75 states have (on average 2.2666666666666666) internal successors, (170), 63 states have internal predecessors, (170), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-16 09:03:06,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:03:06,162 INFO L93 Difference]: Finished difference Result 1190 states and 1318 transitions. [2021-12-16 09:03:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-12-16 09:03:06,163 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 2.2666666666666666) internal successors, (170), 63 states have internal predecessors, (170), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) Word has length 364 [2021-12-16 09:03:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:03:06,165 INFO L225 Difference]: With dead ends: 1190 [2021-12-16 09:03:06,165 INFO L226 Difference]: Without dead ends: 901 [2021-12-16 09:03:06,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 708 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38669 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=20381, Invalid=61129, Unknown=0, NotChecked=0, Total=81510 [2021-12-16 09:03:06,172 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 896 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 09:03:06,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 261 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 09:03:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-12-16 09:03:06,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 709. [2021-12-16 09:03:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 681 states have (on average 1.1013215859030836) internal successors, (750), 681 states have internal predecessors, (750), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) [2021-12-16 09:03:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 778 transitions. [2021-12-16 09:03:06,198 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 778 transitions. Word has length 364 [2021-12-16 09:03:06,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:03:06,198 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 778 transitions. [2021-12-16 09:03:06,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 2.2666666666666666) internal successors, (170), 63 states have internal predecessors, (170), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-16 09:03:06,198 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 778 transitions. [2021-12-16 09:03:06,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-12-16 09:03:06,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:03:06,202 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 15, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2021-12-16 09:03:06,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 09:03:06,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:03:06,415 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:03:06,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:03:06,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1968716438, now seen corresponding path program 13 times [2021-12-16 09:03:06,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:03:06,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096258876] [2021-12-16 09:03:06,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:03:06,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:03:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:06,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 09:03:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:06,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:06,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:06,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:07,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:07,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:07,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:07,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:07,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:07,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:07,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:07,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:07,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:07,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 23745 backedges. 14822 proven. 1579 refuted. 0 times theorem prover too weak. 7344 trivial. 0 not checked. [2021-12-16 09:03:07,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:03:07,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096258876] [2021-12-16 09:03:07,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096258876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:03:07,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341759473] [2021-12-16 09:03:07,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 09:03:07,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:03:07,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:03:07,595 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:03:07,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 09:03:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:07,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-16 09:03:07,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:03:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 23745 backedges. 14879 proven. 1520 refuted. 0 times theorem prover too weak. 7346 trivial. 0 not checked. [2021-12-16 09:03:08,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 09:03:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 23745 backedges. 14932 proven. 1467 refuted. 0 times theorem prover too weak. 7346 trivial. 0 not checked. [2021-12-16 09:03:13,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341759473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 09:03:13,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 09:03:13,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 49, 49] total 55 [2021-12-16 09:03:13,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582140236] [2021-12-16 09:03:13,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 09:03:13,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-16 09:03:13,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:03:13,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-16 09:03:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2646, Unknown=0, NotChecked=0, Total=2970 [2021-12-16 09:03:13,970 INFO L87 Difference]: Start difference. First operand 709 states and 778 transitions. Second operand has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 44 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-16 09:03:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:03:16,376 INFO L93 Difference]: Finished difference Result 1123 states and 1243 transitions. [2021-12-16 09:03:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-16 09:03:16,376 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 44 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 516 [2021-12-16 09:03:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 09:03:16,378 INFO L225 Difference]: With dead ends: 1123 [2021-12-16 09:03:16,379 INFO L226 Difference]: Without dead ends: 746 [2021-12-16 09:03:16,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1222 GetRequests, 1061 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5938 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4179, Invalid=21581, Unknown=0, NotChecked=0, Total=25760 [2021-12-16 09:03:16,383 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 79 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 09:03:16,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 808 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 09:03:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-12-16 09:03:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 712. [2021-12-16 09:03:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 684 states have (on average 1.0891812865497077) internal successors, (745), 684 states have internal predecessors, (745), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) [2021-12-16 09:03:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 773 transitions. [2021-12-16 09:03:16,408 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 773 transitions. Word has length 516 [2021-12-16 09:03:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 09:03:16,409 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 773 transitions. [2021-12-16 09:03:16,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 44 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-16 09:03:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 773 transitions. [2021-12-16 09:03:16,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2021-12-16 09:03:16,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 09:03:16,412 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 17, 16, 16, 16, 16, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2021-12-16 09:03:16,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 09:03:16,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:03:16,627 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-16 09:03:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:03:16,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2137096239, now seen corresponding path program 14 times [2021-12-16 09:03:16,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:03:16,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51112562] [2021-12-16 09:03:16,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:03:16,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:03:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:16,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 09:03:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:16,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 09:03:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:03:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24265 backedges. 11799 proven. 6875 refuted. 0 times theorem prover too weak. 5591 trivial. 0 not checked. [2021-12-16 09:03:17,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:03:17,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51112562] [2021-12-16 09:03:17,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51112562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:03:17,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309423939] [2021-12-16 09:03:17,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:03:17,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:03:17,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:03:17,884 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:03:17,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 09:03:18,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:03:18,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:03:18,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-16 09:03:18,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:03:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 24265 backedges. 11832 proven. 6842 refuted. 0 times theorem prover too weak. 5591 trivial. 0 not checked. [2021-12-16 09:03:18,850 INFO L328 TraceCheckSpWp]: Computing backward predicates...