./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/recursive/Ackermann04.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-19 14:59:56,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-19 14:59:56,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-19 14:59:56,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-19 14:59:56,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-19 14:59:56,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-19 14:59:56,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-19 14:59:56,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-19 14:59:56,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-19 14:59:56,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-19 14:59:56,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-19 14:59:56,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-19 14:59:56,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-19 14:59:56,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-19 14:59:56,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-19 14:59:56,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-19 14:59:56,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-19 14:59:56,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-19 14:59:56,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-19 14:59:56,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-19 14:59:56,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-19 14:59:56,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-19 14:59:56,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-19 14:59:56,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-19 14:59:56,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-19 14:59:56,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-19 14:59:56,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-19 14:59:56,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-19 14:59:56,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-19 14:59:56,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-19 14:59:56,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-19 14:59:56,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-19 14:59:56,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-19 14:59:56,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-19 14:59:56,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-19 14:59:56,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-19 14:59:56,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-19 14:59:56,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-19 14:59:56,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-19 14:59:56,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-19 14:59:56,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-19 14:59:56,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-12-19 14:59:56,636 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-19 14:59:56,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-19 14:59:56,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-19 14:59:56,637 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-19 14:59:56,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-19 14:59:56,638 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-19 14:59:56,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-19 14:59:56,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-19 14:59:56,639 INFO L138 SettingsManager]: * Use SBE=true [2021-12-19 14:59:56,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-19 14:59:56,640 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-19 14:59:56,640 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-19 14:59:56,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-19 14:59:56,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-19 14:59:56,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-19 14:59:56,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-19 14:59:56,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-19 14:59:56,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-19 14:59:56,641 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-19 14:59:56,641 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-19 14:59:56,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-19 14:59:56,642 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-19 14:59:56,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-19 14:59:56,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-19 14:59:56,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-19 14:59:56,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-19 14:59:56,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-19 14:59:56,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-19 14:59:56,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-19 14:59:56,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-19 14:59:56,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-19 14:59:56,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-19 14:59:56,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-19 14:59:56,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-19 14:59:56,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2021-12-19 14:59:56,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-19 14:59:56,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-19 14:59:56,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-19 14:59:56,869 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-19 14:59:56,870 INFO L275 PluginConnector]: CDTParser initialized [2021-12-19 14:59:56,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann04.c [2021-12-19 14:59:56,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eed31d2b3/29315356fa294ade8cbb30db13374bfe/FLAG421b18303 [2021-12-19 14:59:57,313 INFO L306 CDTParser]: Found 1 translation units. [2021-12-19 14:59:57,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c [2021-12-19 14:59:57,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eed31d2b3/29315356fa294ade8cbb30db13374bfe/FLAG421b18303 [2021-12-19 14:59:57,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eed31d2b3/29315356fa294ade8cbb30db13374bfe [2021-12-19 14:59:57,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-19 14:59:57,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-19 14:59:57,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-19 14:59:57,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-19 14:59:57,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-19 14:59:57,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 02:59:57" (1/1) ... [2021-12-19 14:59:57,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69129c8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57, skipping insertion in model container [2021-12-19 14:59:57,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 02:59:57" (1/1) ... [2021-12-19 14:59:57,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-19 14:59:57,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-19 14:59:57,926 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2021-12-19 14:59:57,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 14:59:57,933 INFO L203 MainTranslator]: Completed pre-run [2021-12-19 14:59:57,962 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2021-12-19 14:59:57,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 14:59:57,975 INFO L208 MainTranslator]: Completed translation [2021-12-19 14:59:57,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57 WrapperNode [2021-12-19 14:59:57,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-19 14:59:57,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-19 14:59:57,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-19 14:59:57,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-19 14:59:57,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57" (1/1) ... [2021-12-19 14:59:57,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57" (1/1) ... [2021-12-19 14:59:58,003 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-12-19 14:59:58,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-19 14:59:58,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-19 14:59:58,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-19 14:59:58,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-19 14:59:58,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57" (1/1) ... [2021-12-19 14:59:58,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57" (1/1) ... [2021-12-19 14:59:58,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57" (1/1) ... [2021-12-19 14:59:58,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57" (1/1) ... [2021-12-19 14:59:58,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57" (1/1) ... [2021-12-19 14:59:58,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57" (1/1) ... [2021-12-19 14:59:58,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57" (1/1) ... [2021-12-19 14:59:58,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-19 14:59:58,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-19 14:59:58,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-19 14:59:58,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-19 14:59:58,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57" (1/1) ... [2021-12-19 14:59:58,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-19 14:59:58,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:58,064 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) [2021-12-19 14:59:58,078 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 [2021-12-19 14:59:58,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-19 14:59:58,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-19 14:59:58,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-19 14:59:58,101 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-12-19 14:59:58,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-12-19 14:59:58,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-19 14:59:58,147 INFO L236 CfgBuilder]: Building ICFG [2021-12-19 14:59:58,149 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-19 14:59:58,311 INFO L277 CfgBuilder]: Performing block encoding [2021-12-19 14:59:58,316 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-19 14:59:58,317 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-19 14:59:58,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 02:59:58 BoogieIcfgContainer [2021-12-19 14:59:58,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-19 14:59:58,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-19 14:59:58,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-19 14:59:58,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-19 14:59:58,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 02:59:57" (1/3) ... [2021-12-19 14:59:58,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f2f453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 02:59:58, skipping insertion in model container [2021-12-19 14:59:58,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:59:57" (2/3) ... [2021-12-19 14:59:58,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f2f453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 02:59:58, skipping insertion in model container [2021-12-19 14:59:58,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 02:59:58" (3/3) ... [2021-12-19 14:59:58,324 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2021-12-19 14:59:58,328 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-19 14:59:58,328 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-19 14:59:58,408 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-19 14:59:58,429 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 [2021-12-19 14:59:58,430 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-19 14:59:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-19 14:59:58,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-19 14:59:58,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:58,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:58,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:58,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:58,453 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2021-12-19 14:59:58,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:58,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42921143] [2021-12-19 14:59:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:58,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:58,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:58,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42921143] [2021-12-19 14:59:58,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42921143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:59:58,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:59:58,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:59:58,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399772247] [2021-12-19 14:59:58,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:58,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:59:58,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:58,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:59:58,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:59:58,702 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:58,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:58,843 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-19 14:59:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 14:59:58,846 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 [2021-12-19 14:59:58,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:58,854 INFO L225 Difference]: With dead ends: 73 [2021-12-19 14:59:58,854 INFO L226 Difference]: Without dead ends: 59 [2021-12-19 14:59:58,857 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 [2021-12-19 14:59:58,860 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:58,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 125 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-19 14:59:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-12-19 14:59:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-19 14:59:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-12-19 14:59:58,898 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2021-12-19 14:59:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:58,898 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-12-19 14:59:58,899 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) [2021-12-19 14:59:58,899 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-12-19 14:59:58,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-19 14:59:58,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:58,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:58,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-19 14:59:58,900 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2021-12-19 14:59:58,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:58,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626089064] [2021-12-19 14:59:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:58,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:58,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:58,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626089064] [2021-12-19 14:59:58,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626089064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:59:58,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:59:58,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:59:58,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366054166] [2021-12-19 14:59:58,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:58,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:59:58,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:58,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:59:58,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:59:58,948 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:58,988 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-12-19 14:59:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-19 14:59:58,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-19 14:59:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:58,990 INFO L225 Difference]: With dead ends: 51 [2021-12-19 14:59:58,990 INFO L226 Difference]: Without dead ends: 49 [2021-12-19 14:59:58,991 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 [2021-12-19 14:59:58,992 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:58,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:59:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-19 14:59:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-19 14:59:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.411764705882353) internal successors, (48), 40 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-19 14:59:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-19 14:59:59,003 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2021-12-19 14:59:59,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:59,003 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-19 14:59:59,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-19 14:59:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-19 14:59:59,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:59,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:59,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-19 14:59:59,005 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:59,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:59,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2021-12-19 14:59:59,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:59,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988338746] [2021-12-19 14:59:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:59,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:59,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:59,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988338746] [2021-12-19 14:59:59,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988338746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:59:59,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:59:59,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:59:59,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619879553] [2021-12-19 14:59:59,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:59,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:59:59,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:59:59,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:59:59,047 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:59,112 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-12-19 14:59:59,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 14:59:59,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-19 14:59:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:59,115 INFO L225 Difference]: With dead ends: 76 [2021-12-19 14:59:59,116 INFO L226 Difference]: Without dead ends: 74 [2021-12-19 14:59:59,117 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 [2021-12-19 14:59:59,123 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:59,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 104 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:59:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-19 14:59:59,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-12-19 14:59:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 55 states have internal predecessors, (67), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-19 14:59:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-12-19 14:59:59,146 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 9 [2021-12-19 14:59:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:59,146 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-12-19 14:59:59,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-12-19 14:59:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-19 14:59:59,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:59,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:59,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-19 14:59:59,148 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:59,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:59,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2021-12-19 14:59:59,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:59,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642023519] [2021-12-19 14:59:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:59,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:59,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:59,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642023519] [2021-12-19 14:59:59,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642023519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:59:59,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:59:59,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:59:59,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731260697] [2021-12-19 14:59:59,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:59,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:59:59,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:59,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:59:59,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:59:59,186 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-19 14:59:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:59,261 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-12-19 14:59:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 14:59:59,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2021-12-19 14:59:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:59,263 INFO L225 Difference]: With dead ends: 116 [2021-12-19 14:59:59,263 INFO L226 Difference]: Without dead ends: 108 [2021-12-19 14:59:59,264 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 [2021-12-19 14:59:59,265 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:59,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 103 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-19 14:59:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-12-19 14:59:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-19 14:59:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2021-12-19 14:59:59,279 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2021-12-19 14:59:59,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:59,280 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2021-12-19 14:59:59,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-19 14:59:59,280 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2021-12-19 14:59:59,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-19 14:59:59,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:59,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:59,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-19 14:59:59,281 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:59,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:59,282 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2021-12-19 14:59:59,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:59,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077583808] [2021-12-19 14:59:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:59,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:59,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:59,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077583808] [2021-12-19 14:59:59,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077583808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:59:59,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:59:59,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:59:59,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885284968] [2021-12-19 14:59:59,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:59:59,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-19 14:59:59,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:59,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-19 14:59:59,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-19 14:59:59,333 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:59,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:59,382 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-12-19 14:59:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-19 14:59:59,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-19 14:59:59,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:59,384 INFO L225 Difference]: With dead ends: 168 [2021-12-19 14:59:59,384 INFO L226 Difference]: Without dead ends: 97 [2021-12-19 14:59:59,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:59:59,386 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:59,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 89 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:59:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-19 14:59:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-12-19 14:59:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-19 14:59:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-12-19 14:59:59,404 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2021-12-19 14:59:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:59,406 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-12-19 14:59:59,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:59:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-12-19 14:59:59,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-19 14:59:59,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:59,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:59,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-19 14:59:59,409 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 14:59:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:59:59,413 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2021-12-19 14:59:59,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:59:59,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499570424] [2021-12-19 14:59:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:59,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:59:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:59,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:59:59,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499570424] [2021-12-19 14:59:59,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499570424] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:59:59,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383881640] [2021-12-19 14:59:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:59:59,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:59:59,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:59:59,469 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) [2021-12-19 14:59:59,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-19 14:59:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:59:59,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-19 14:59:59,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:59:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:59,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:59:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:59:59,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383881640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:59:59,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:59:59,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-19 14:59:59,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034317611] [2021-12-19 14:59:59,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:59:59,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-19 14:59:59,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:59:59,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-19 14:59:59,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-19 14:59:59,661 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-12-19 14:59:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:59:59,875 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2021-12-19 14:59:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-19 14:59:59,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 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 16 [2021-12-19 14:59:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:59:59,878 INFO L225 Difference]: With dead ends: 274 [2021-12-19 14:59:59,878 INFO L226 Difference]: Without dead ends: 272 [2021-12-19 14:59:59,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-19 14:59:59,880 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 250 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:59:59,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 180 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:59:59,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-19 14:59:59,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2021-12-19 14:59:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-19 14:59:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2021-12-19 14:59:59,903 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2021-12-19 14:59:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:59:59,904 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2021-12-19 14:59:59,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-12-19 14:59:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2021-12-19 14:59:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-19 14:59:59,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:59:59,905 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:59:59,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-19 15:00:00,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-19 15:00:00,122 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:00,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2021-12-19 15:00:00,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:00,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934879321] [2021-12-19 15:00:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:00,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:00,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:00,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934879321] [2021-12-19 15:00:00,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934879321] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:00,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915226284] [2021-12-19 15:00:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:00,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:00,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:00,178 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) [2021-12-19 15:00:00,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-19 15:00:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:00,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 15:00:00,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:00,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:00,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915226284] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:00,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:00,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-19 15:00:00,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225275094] [2021-12-19 15:00:00,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:00,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-19 15:00:00,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:00,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-19 15:00:00,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-19 15:00:00,380 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-12-19 15:00:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:00,618 INFO L93 Difference]: Finished difference Result 512 states and 695 transitions. [2021-12-19 15:00:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-19 15:00:00,619 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 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 17 [2021-12-19 15:00:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:00,628 INFO L225 Difference]: With dead ends: 512 [2021-12-19 15:00:00,628 INFO L226 Difference]: Without dead ends: 510 [2021-12-19 15:00:00,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-12-19 15:00:00,631 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 196 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:00,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 194 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 15:00:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-19 15:00:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 445. [2021-12-19 15:00:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 347 states have (on average 1.2276657060518732) internal successors, (426), 354 states have internal predecessors, (426), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-19 15:00:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2021-12-19 15:00:00,688 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 17 [2021-12-19 15:00:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:00,689 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2021-12-19 15:00:00,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-12-19 15:00:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2021-12-19 15:00:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-19 15:00:00,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:00,690 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:00,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:00,891 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 [2021-12-19 15:00:00,891 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:00,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:00,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2021-12-19 15:00:00,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:00,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006640586] [2021-12-19 15:00:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:00,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:00,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-19 15:00:00,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006640586] [2021-12-19 15:00:00,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006640586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246719033] [2021-12-19 15:00:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:00,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:00,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:00,963 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) [2021-12-19 15:00:00,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-19 15:00:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:00,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-19 15:00:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 15:00:01,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 15:00:01,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246719033] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:01,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:01,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2021-12-19 15:00:01,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051860624] [2021-12-19 15:00:01,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:01,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-19 15:00:01,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:01,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-19 15:00:01,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-12-19 15:00:01,257 INFO L87 Difference]: Start difference. First operand 445 states and 561 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-19 15:00:01,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:01,909 INFO L93 Difference]: Finished difference Result 1122 states and 1582 transitions. [2021-12-19 15:00:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-19 15:00:01,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2021-12-19 15:00:01,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:01,914 INFO L225 Difference]: With dead ends: 1122 [2021-12-19 15:00:01,915 INFO L226 Difference]: Without dead ends: 781 [2021-12-19 15:00:01,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2021-12-19 15:00:01,918 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 282 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:01,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 98 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 15:00:01,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-12-19 15:00:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 585. [2021-12-19 15:00:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 455 states have (on average 1.2175824175824175) internal successors, (554), 475 states have internal predecessors, (554), 86 states have call successors, (86), 36 states have call predecessors, (86), 38 states have return successors, (90), 73 states have call predecessors, (90), 66 states have call successors, (90) [2021-12-19 15:00:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 730 transitions. [2021-12-19 15:00:01,953 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 730 transitions. Word has length 24 [2021-12-19 15:00:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:01,953 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 730 transitions. [2021-12-19 15:00:01,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-19 15:00:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 730 transitions. [2021-12-19 15:00:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-19 15:00:01,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:01,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:01,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:02,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:02,178 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:02,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1403347671, now seen corresponding path program 1 times [2021-12-19 15:00:02,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:02,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258760661] [2021-12-19 15:00:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:02,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:02,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258760661] [2021-12-19 15:00:02,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258760661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166320656] [2021-12-19 15:00:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:02,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:02,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:02,238 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) [2021-12-19 15:00:02,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-19 15:00:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:02,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-19 15:00:02,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:02,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:02,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166320656] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:02,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:02,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-19 15:00:02,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285475379] [2021-12-19 15:00:02,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:02,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-19 15:00:02,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:02,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-19 15:00:02,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-19 15:00:02,445 INFO L87 Difference]: Start difference. First operand 585 states and 730 transitions. Second operand has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 10 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:02,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:02,744 INFO L93 Difference]: Finished difference Result 1053 states and 1343 transitions. [2021-12-19 15:00:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-19 15:00:02,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 10 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-19 15:00:02,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:02,749 INFO L225 Difference]: With dead ends: 1053 [2021-12-19 15:00:02,749 INFO L226 Difference]: Without dead ends: 1052 [2021-12-19 15:00:02,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2021-12-19 15:00:02,751 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 309 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:02,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 249 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 15:00:02,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-12-19 15:00:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 901. [2021-12-19 15:00:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 703 states have (on average 1.1806543385490753) internal successors, (830), 735 states have internal predecessors, (830), 130 states have call successors, (130), 56 states have call predecessors, (130), 62 states have return successors, (138), 109 states have call predecessors, (138), 102 states have call successors, (138) [2021-12-19 15:00:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1098 transitions. [2021-12-19 15:00:02,804 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1098 transitions. Word has length 28 [2021-12-19 15:00:02,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:02,805 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1098 transitions. [2021-12-19 15:00:02,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 10 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1098 transitions. [2021-12-19 15:00:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-19 15:00:02,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:02,806 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:02,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:03,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:03,029 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2021-12-19 15:00:03,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:03,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472727131] [2021-12-19 15:00:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:03,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:03,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-19 15:00:03,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:03,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472727131] [2021-12-19 15:00:03,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472727131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:03,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120713734] [2021-12-19 15:00:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:03,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:03,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:03,124 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) [2021-12-19 15:00:03,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-19 15:00:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-19 15:00:03,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-19 15:00:03,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-19 15:00:03,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120713734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:03,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:03,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-12-19 15:00:03,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512992677] [2021-12-19 15:00:03,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:03,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-19 15:00:03,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-19 15:00:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-19 15:00:03,379 INFO L87 Difference]: Start difference. First operand 901 states and 1098 transitions. Second operand has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 15:00:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:03,607 INFO L93 Difference]: Finished difference Result 1027 states and 1299 transitions. [2021-12-19 15:00:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-19 15:00:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-19 15:00:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:03,612 INFO L225 Difference]: With dead ends: 1027 [2021-12-19 15:00:03,612 INFO L226 Difference]: Without dead ends: 1026 [2021-12-19 15:00:03,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-12-19 15:00:03,613 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 119 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:03,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 126 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 15:00:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-12-19 15:00:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 943. [2021-12-19 15:00:03,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 740 states have (on average 1.1824324324324325) internal successors, (875), 768 states have internal predecessors, (875), 135 states have call successors, (135), 61 states have call predecessors, (135), 62 states have return successors, (138), 113 states have call predecessors, (138), 102 states have call successors, (138) [2021-12-19 15:00:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1148 transitions. [2021-12-19 15:00:03,670 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1148 transitions. Word has length 28 [2021-12-19 15:00:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:03,670 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 1148 transitions. [2021-12-19 15:00:03,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 15:00:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1148 transitions. [2021-12-19 15:00:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-19 15:00:03,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:03,672 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:03,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:03,887 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,SelfDestructingSolverStorable9 [2021-12-19 15:00:03,888 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:03,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2021-12-19 15:00:03,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:03,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223175314] [2021-12-19 15:00:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:03,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:03,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:03,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:03,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:03,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223175314] [2021-12-19 15:00:03,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223175314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:03,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280904539] [2021-12-19 15:00:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:03,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:03,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:03,991 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) [2021-12-19 15:00:03,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-19 15:00:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:04,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-19 15:00:04,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:04,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:04,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280904539] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:04,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:04,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-12-19 15:00:04,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914020618] [2021-12-19 15:00:04,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:04,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-19 15:00:04,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:04,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-19 15:00:04,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-19 15:00:04,301 INFO L87 Difference]: Start difference. First operand 943 states and 1148 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 15:00:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:04,823 INFO L93 Difference]: Finished difference Result 1435 states and 2099 transitions. [2021-12-19 15:00:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-19 15:00:04,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-12-19 15:00:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:04,830 INFO L225 Difference]: With dead ends: 1435 [2021-12-19 15:00:04,831 INFO L226 Difference]: Without dead ends: 1433 [2021-12-19 15:00:04,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-12-19 15:00:04,832 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 143 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:04,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 208 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 15:00:04,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-12-19 15:00:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1237. [2021-12-19 15:00:04,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 932 states have (on average 1.1727467811158798) internal successors, (1093), 971 states have internal predecessors, (1093), 192 states have call successors, (192), 68 states have call predecessors, (192), 107 states have return successors, (366), 197 states have call predecessors, (366), 158 states have call successors, (366) [2021-12-19 15:00:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1651 transitions. [2021-12-19 15:00:04,894 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1651 transitions. Word has length 33 [2021-12-19 15:00:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:04,894 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 1651 transitions. [2021-12-19 15:00:04,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 15:00:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1651 transitions. [2021-12-19 15:00:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-19 15:00:04,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:04,895 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:04,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:05,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:05,111 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2021-12-19 15:00:05,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:05,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258622886] [2021-12-19 15:00:05,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:05,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:05,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:05,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:05,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:05,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258622886] [2021-12-19 15:00:05,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258622886] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:05,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584403489] [2021-12-19 15:00:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:05,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:05,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:05,213 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) [2021-12-19 15:00:05,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-19 15:00:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:05,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-19 15:00:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:05,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:05,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584403489] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:05,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-19 15:00:05,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-19 15:00:05,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425419208] [2021-12-19 15:00:05,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 15:00:05,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-19 15:00:05,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:05,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-19 15:00:05,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-19 15:00:05,566 INFO L87 Difference]: Start difference. First operand 1237 states and 1651 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 15:00:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:05,746 INFO L93 Difference]: Finished difference Result 1303 states and 1719 transitions. [2021-12-19 15:00:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-19 15:00:05,747 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2021-12-19 15:00:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:05,753 INFO L225 Difference]: With dead ends: 1303 [2021-12-19 15:00:05,754 INFO L226 Difference]: Without dead ends: 1302 [2021-12-19 15:00:05,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-12-19 15:00:05,755 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 45 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:05,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 125 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 15:00:05,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-12-19 15:00:05,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1236. [2021-12-19 15:00:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 932 states have (on average 1.1641630901287554) internal successors, (1085), 970 states have internal predecessors, (1085), 192 states have call successors, (192), 68 states have call predecessors, (192), 107 states have return successors, (366), 197 states have call predecessors, (366), 158 states have call successors, (366) [2021-12-19 15:00:05,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1643 transitions. [2021-12-19 15:00:05,822 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1643 transitions. Word has length 34 [2021-12-19 15:00:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:05,823 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 1643 transitions. [2021-12-19 15:00:05,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 15:00:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1643 transitions. [2021-12-19 15:00:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-19 15:00:05,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:05,824 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:05,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:06,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:06,048 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:06,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2021-12-19 15:00:06,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:06,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418752442] [2021-12-19 15:00:06,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:06,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:06,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:06,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:06,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:06,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418752442] [2021-12-19 15:00:06,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418752442] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:06,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32410640] [2021-12-19 15:00:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:06,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:06,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:06,122 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) [2021-12-19 15:00:06,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-19 15:00:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:06,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-19 15:00:06,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:06,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:06,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32410640] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:06,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-19 15:00:06,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-19 15:00:06,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402498457] [2021-12-19 15:00:06,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 15:00:06,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-19 15:00:06,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:06,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-19 15:00:06,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-19 15:00:06,469 INFO L87 Difference]: Start difference. First operand 1236 states and 1643 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 15:00:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:06,718 INFO L93 Difference]: Finished difference Result 1343 states and 1866 transitions. [2021-12-19 15:00:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-19 15:00:06,718 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2021-12-19 15:00:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:06,725 INFO L225 Difference]: With dead ends: 1343 [2021-12-19 15:00:06,725 INFO L226 Difference]: Without dead ends: 1342 [2021-12-19 15:00:06,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-12-19 15:00:06,727 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 65 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:06,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 176 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 15:00:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-12-19 15:00:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1244. [2021-12-19 15:00:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 940 states have (on average 1.1595744680851063) internal successors, (1090), 974 states have internal predecessors, (1090), 196 states have call successors, (196), 68 states have call predecessors, (196), 103 states have return successors, (290), 201 states have call predecessors, (290), 162 states have call successors, (290) [2021-12-19 15:00:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1576 transitions. [2021-12-19 15:00:06,803 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1576 transitions. Word has length 37 [2021-12-19 15:00:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:06,803 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 1576 transitions. [2021-12-19 15:00:06,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 15:00:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1576 transitions. [2021-12-19 15:00:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-19 15:00:06,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:06,805 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:06,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:07,019 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,SelfDestructingSolverStorable12 [2021-12-19 15:00:07,020 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:07,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:07,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1975915362, now seen corresponding path program 2 times [2021-12-19 15:00:07,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:07,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664938144] [2021-12-19 15:00:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:07,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:07,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-19 15:00:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-19 15:00:07,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:07,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664938144] [2021-12-19 15:00:07,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664938144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:07,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894995153] [2021-12-19 15:00:07,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 15:00:07,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:07,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:07,121 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) [2021-12-19 15:00:07,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-19 15:00:07,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 15:00:07,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:07,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-19 15:00:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-19 15:00:07,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-19 15:00:07,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894995153] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:07,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:07,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-12-19 15:00:07,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488368322] [2021-12-19 15:00:07,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:07,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-19 15:00:07,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:07,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-19 15:00:07,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-19 15:00:07,483 INFO L87 Difference]: Start difference. First operand 1244 states and 1576 transitions. Second operand has 23 states, 20 states have (on average 3.15) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 15:00:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:07,993 INFO L93 Difference]: Finished difference Result 1537 states and 1982 transitions. [2021-12-19 15:00:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-19 15:00:07,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.15) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-19 15:00:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:08,000 INFO L225 Difference]: With dead ends: 1537 [2021-12-19 15:00:08,000 INFO L226 Difference]: Without dead ends: 1536 [2021-12-19 15:00:08,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2021-12-19 15:00:08,001 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 333 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:08,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 202 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 15:00:08,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-12-19 15:00:08,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1281. [2021-12-19 15:00:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 970 states have (on average 1.1597938144329898) internal successors, (1125), 1003 states have internal predecessors, (1125), 203 states have call successors, (203), 72 states have call predecessors, (203), 103 states have return successors, (290), 205 states have call predecessors, (290), 162 states have call successors, (290) [2021-12-19 15:00:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1618 transitions. [2021-12-19 15:00:08,059 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1618 transitions. Word has length 44 [2021-12-19 15:00:08,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:08,059 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1618 transitions. [2021-12-19 15:00:08,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.15) internal successors, (63), 17 states have internal predecessors, (63), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 15:00:08,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1618 transitions. [2021-12-19 15:00:08,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-19 15:00:08,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:08,061 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:08,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:08,278 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,SelfDestructingSolverStorable13 [2021-12-19 15:00:08,279 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:08,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:08,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2021-12-19 15:00:08,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:08,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047462496] [2021-12-19 15:00:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:08,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:08,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:08,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:08,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:08,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047462496] [2021-12-19 15:00:08,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047462496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:08,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513333378] [2021-12-19 15:00:08,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 15:00:08,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:08,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:08,372 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) [2021-12-19 15:00:08,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-19 15:00:08,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 15:00:08,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:08,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 15:00:08,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:08,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:08,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513333378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:08,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:08,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-19 15:00:08,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328075449] [2021-12-19 15:00:08,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:08,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-19 15:00:08,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:08,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-19 15:00:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-19 15:00:08,743 INFO L87 Difference]: Start difference. First operand 1281 states and 1618 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 15:00:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:09,788 INFO L93 Difference]: Finished difference Result 2805 states and 4077 transitions. [2021-12-19 15:00:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-19 15:00:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2021-12-19 15:00:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:09,799 INFO L225 Difference]: With dead ends: 2805 [2021-12-19 15:00:09,799 INFO L226 Difference]: Without dead ends: 1937 [2021-12-19 15:00:09,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=586, Invalid=1964, Unknown=0, NotChecked=0, Total=2550 [2021-12-19 15:00:09,806 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 225 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:09,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 304 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-19 15:00:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-12-19 15:00:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1461. [2021-12-19 15:00:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1108 states have (on average 1.1498194945848375) internal successors, (1274), 1147 states have internal predecessors, (1274), 227 states have call successors, (227), 86 states have call predecessors, (227), 121 states have return successors, (328), 227 states have call predecessors, (328), 181 states have call successors, (328) [2021-12-19 15:00:09,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1829 transitions. [2021-12-19 15:00:09,906 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1829 transitions. Word has length 45 [2021-12-19 15:00:09,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:09,906 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 1829 transitions. [2021-12-19 15:00:09,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 15:00:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1829 transitions. [2021-12-19 15:00:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-19 15:00:09,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:09,909 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:09,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:10,127 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,SelfDestructingSolverStorable14 [2021-12-19 15:00:10,127 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash -242379077, now seen corresponding path program 1 times [2021-12-19 15:00:10,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:10,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355801100] [2021-12-19 15:00:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:10,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:10,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-19 15:00:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-19 15:00:10,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:10,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355801100] [2021-12-19 15:00:10,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355801100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:10,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655317296] [2021-12-19 15:00:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:10,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:10,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:10,202 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) [2021-12-19 15:00:10,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-19 15:00:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:10,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-19 15:00:10,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-19 15:00:10,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-19 15:00:10,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655317296] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:10,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:10,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-12-19 15:00:10,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802289066] [2021-12-19 15:00:10,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:10,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-19 15:00:10,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:10,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-19 15:00:10,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-19 15:00:10,510 INFO L87 Difference]: Start difference. First operand 1461 states and 1829 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-19 15:00:11,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:11,083 INFO L93 Difference]: Finished difference Result 1895 states and 2483 transitions. [2021-12-19 15:00:11,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-19 15:00:11,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2021-12-19 15:00:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:11,092 INFO L225 Difference]: With dead ends: 1895 [2021-12-19 15:00:11,092 INFO L226 Difference]: Without dead ends: 1824 [2021-12-19 15:00:11,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-12-19 15:00:11,094 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 198 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:11,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 75 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 15:00:11,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-12-19 15:00:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1397. [2021-12-19 15:00:11,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1056 states have (on average 1.1410984848484849) internal successors, (1205), 1099 states have internal predecessors, (1205), 216 states have call successors, (216), 79 states have call predecessors, (216), 121 states have return successors, (328), 218 states have call predecessors, (328), 181 states have call successors, (328) [2021-12-19 15:00:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1749 transitions. [2021-12-19 15:00:11,172 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1749 transitions. Word has length 52 [2021-12-19 15:00:11,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:11,172 INFO L470 AbstractCegarLoop]: Abstraction has 1397 states and 1749 transitions. [2021-12-19 15:00:11,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-19 15:00:11,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1749 transitions. [2021-12-19 15:00:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-19 15:00:11,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:11,174 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:11,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-19 15:00:11,399 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,SelfDestructingSolverStorable15 [2021-12-19 15:00:11,399 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:11,400 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2021-12-19 15:00:11,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:11,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069252712] [2021-12-19 15:00:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:11,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:11,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:11,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:11,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:11,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:00:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 15:00:11,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:11,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069252712] [2021-12-19 15:00:11,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069252712] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:11,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503161942] [2021-12-19 15:00:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:11,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:11,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:11,530 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) [2021-12-19 15:00:11,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-19 15:00:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:11,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-19 15:00:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-19 15:00:11,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 15:00:12,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503161942] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:12,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:12,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-19 15:00:12,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738572153] [2021-12-19 15:00:12,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:12,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-19 15:00:12,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:12,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-19 15:00:12,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-19 15:00:12,117 INFO L87 Difference]: Start difference. First operand 1397 states and 1749 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-19 15:00:13,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:13,554 INFO L93 Difference]: Finished difference Result 3379 states and 6003 transitions. [2021-12-19 15:00:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-19 15:00:13,555 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2021-12-19 15:00:13,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:13,578 INFO L225 Difference]: With dead ends: 3379 [2021-12-19 15:00:13,579 INFO L226 Difference]: Without dead ends: 3377 [2021-12-19 15:00:13,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1158, Invalid=5004, Unknown=0, NotChecked=0, Total=6162 [2021-12-19 15:00:13,585 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:13,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 238 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-19 15:00:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-12-19 15:00:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 2467. [2021-12-19 15:00:13,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 1731 states have (on average 1.1103408434430966) internal successors, (1922), 1777 states have internal predecessors, (1922), 433 states have call successors, (433), 93 states have call predecessors, (433), 299 states have return successors, (2469), 596 states have call predecessors, (2469), 396 states have call successors, (2469) [2021-12-19 15:00:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 4824 transitions. [2021-12-19 15:00:13,775 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 4824 transitions. Word has length 52 [2021-12-19 15:00:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:13,775 INFO L470 AbstractCegarLoop]: Abstraction has 2467 states and 4824 transitions. [2021-12-19 15:00:13,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-19 15:00:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 4824 transitions. [2021-12-19 15:00:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-19 15:00:13,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:13,779 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:13,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:13,991 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,SelfDestructingSolverStorable16 [2021-12-19 15:00:13,991 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:13,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2021-12-19 15:00:13,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:13,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209487158] [2021-12-19 15:00:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:13,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-19 15:00:14,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:14,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209487158] [2021-12-19 15:00:14,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209487158] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:14,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851054877] [2021-12-19 15:00:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:14,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:14,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:14,113 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) [2021-12-19 15:00:14,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-19 15:00:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:14,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-19 15:00:14,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-19 15:00:14,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-19 15:00:14,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851054877] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:14,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:14,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-19 15:00:14,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446981642] [2021-12-19 15:00:14,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:14,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-19 15:00:14,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:14,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-19 15:00:14,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-19 15:00:14,495 INFO L87 Difference]: Start difference. First operand 2467 states and 4824 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:15,258 INFO L93 Difference]: Finished difference Result 7309 states and 13959 transitions. [2021-12-19 15:00:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-19 15:00:15,259 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-19 15:00:15,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:15,304 INFO L225 Difference]: With dead ends: 7309 [2021-12-19 15:00:15,304 INFO L226 Difference]: Without dead ends: 7308 [2021-12-19 15:00:15,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-19 15:00:15,309 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 875 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:15,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 341 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 15:00:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7308 states. [2021-12-19 15:00:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7308 to 6715. [2021-12-19 15:00:15,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6715 states, 4743 states have (on average 1.1123761332489985) internal successors, (5276), 4849 states have internal predecessors, (5276), 1177 states have call successors, (1177), 273 states have call predecessors, (1177), 791 states have return successors, (6567), 1592 states have call predecessors, (6567), 1050 states have call successors, (6567) [2021-12-19 15:00:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6715 states to 6715 states and 13020 transitions. [2021-12-19 15:00:15,836 INFO L78 Accepts]: Start accepts. Automaton has 6715 states and 13020 transitions. Word has length 58 [2021-12-19 15:00:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:15,836 INFO L470 AbstractCegarLoop]: Abstraction has 6715 states and 13020 transitions. [2021-12-19 15:00:15,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 6715 states and 13020 transitions. [2021-12-19 15:00:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-19 15:00:15,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:15,839 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:15,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:16,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-19 15:00:16,054 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2021-12-19 15:00:16,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:16,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667854015] [2021-12-19 15:00:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:16,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:16,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:16,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:16,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:16,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:00:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 15:00:16,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:16,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667854015] [2021-12-19 15:00:16,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667854015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:16,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629460398] [2021-12-19 15:00:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:16,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:16,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:16,257 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) [2021-12-19 15:00:16,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-19 15:00:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:16,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-19 15:00:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-19 15:00:16,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 15:00:16,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629460398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:16,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:16,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-19 15:00:16,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439419594] [2021-12-19 15:00:16,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:16,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-19 15:00:16,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:16,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-19 15:00:16,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-12-19 15:00:16,881 INFO L87 Difference]: Start difference. First operand 6715 states and 13020 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-19 15:00:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:19,346 INFO L93 Difference]: Finished difference Result 26411 states and 94719 transitions. [2021-12-19 15:00:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-19 15:00:19,347 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2021-12-19 15:00:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:19,659 INFO L225 Difference]: With dead ends: 26411 [2021-12-19 15:00:19,659 INFO L226 Difference]: Without dead ends: 20152 [2021-12-19 15:00:19,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1251, Invalid=4755, Unknown=0, NotChecked=0, Total=6006 [2021-12-19 15:00:19,923 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 159 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:19,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 296 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-19 15:00:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20152 states. [2021-12-19 15:00:21,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20152 to 14221. [2021-12-19 15:00:21,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14221 states, 9461 states have (on average 1.0752563154000634) internal successors, (10173), 9539 states have internal predecessors, (10173), 2706 states have call successors, (2706), 364 states have call predecessors, (2706), 2050 states have return successors, (36260), 4317 states have call predecessors, (36260), 2553 states have call successors, (36260) [2021-12-19 15:00:21,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14221 states to 14221 states and 49139 transitions. [2021-12-19 15:00:21,974 INFO L78 Accepts]: Start accepts. Automaton has 14221 states and 49139 transitions. Word has length 56 [2021-12-19 15:00:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:21,975 INFO L470 AbstractCegarLoop]: Abstraction has 14221 states and 49139 transitions. [2021-12-19 15:00:21,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-19 15:00:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 14221 states and 49139 transitions. [2021-12-19 15:00:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-19 15:00:21,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:21,978 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:21,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-19 15:00:22,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:22,181 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:22,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:22,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1996075823, now seen corresponding path program 2 times [2021-12-19 15:00:22,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:22,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023510325] [2021-12-19 15:00:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:22,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:22,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:22,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023510325] [2021-12-19 15:00:22,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023510325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:22,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112619799] [2021-12-19 15:00:22,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 15:00:22,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:22,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:22,306 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) [2021-12-19 15:00:22,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-19 15:00:22,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 15:00:22,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:22,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-19 15:00:22,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:22,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:22,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112619799] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:22,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:22,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-12-19 15:00:22,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028286195] [2021-12-19 15:00:22,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:22,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-19 15:00:22,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:22,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-19 15:00:22,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2021-12-19 15:00:22,753 INFO L87 Difference]: Start difference. First operand 14221 states and 49139 transitions. Second operand has 32 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 18 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:24,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:24,395 INFO L93 Difference]: Finished difference Result 22021 states and 73282 transitions. [2021-12-19 15:00:24,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-19 15:00:24,396 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 18 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-19 15:00:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:24,608 INFO L225 Difference]: With dead ends: 22021 [2021-12-19 15:00:24,608 INFO L226 Difference]: Without dead ends: 22020 [2021-12-19 15:00:24,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1054, Invalid=2368, Unknown=0, NotChecked=0, Total=3422 [2021-12-19 15:00:24,629 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 772 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:24,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 626 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-19 15:00:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22020 states. [2021-12-19 15:00:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22020 to 20851. [2021-12-19 15:00:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20851 states, 13848 states have (on average 1.0675909878682843) internal successors, (14784), 14025 states have internal predecessors, (14784), 3890 states have call successors, (3890), 508 states have call predecessors, (3890), 3109 states have return successors, (51912), 6317 states have call predecessors, (51912), 3673 states have call successors, (51912) [2021-12-19 15:00:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20851 states to 20851 states and 70586 transitions. [2021-12-19 15:00:26,742 INFO L78 Accepts]: Start accepts. Automaton has 20851 states and 70586 transitions. Word has length 60 [2021-12-19 15:00:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:26,742 INFO L470 AbstractCegarLoop]: Abstraction has 20851 states and 70586 transitions. [2021-12-19 15:00:26,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 18 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 20851 states and 70586 transitions. [2021-12-19 15:00:26,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-19 15:00:26,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:26,746 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:26,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:26,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:26,955 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:26,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1312915314, now seen corresponding path program 3 times [2021-12-19 15:00:26,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:26,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960690117] [2021-12-19 15:00:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:26,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:27,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-19 15:00:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 3 proven. 116 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-19 15:00:27,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:27,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960690117] [2021-12-19 15:00:27,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960690117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:27,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612896435] [2021-12-19 15:00:27,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 15:00:27,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:27,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:27,111 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) [2021-12-19 15:00:27,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-19 15:00:27,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-19 15:00:27,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:27,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 15:00:27,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-19 15:00:27,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-19 15:00:27,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612896435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 15:00:27,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-19 15:00:27,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 19 [2021-12-19 15:00:27,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775948792] [2021-12-19 15:00:27,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 15:00:27,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 15:00:27,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 15:00:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-19 15:00:27,292 INFO L87 Difference]: Start difference. First operand 20851 states and 70586 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 15:00:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:28,712 INFO L93 Difference]: Finished difference Result 20934 states and 72002 transitions. [2021-12-19 15:00:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-19 15:00:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-12-19 15:00:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:28,925 INFO L225 Difference]: With dead ends: 20934 [2021-12-19 15:00:28,925 INFO L226 Difference]: Without dead ends: 18654 [2021-12-19 15:00:28,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-12-19 15:00:28,958 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:28,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 15:00:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18654 states. [2021-12-19 15:00:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18654 to 18557. [2021-12-19 15:00:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18557 states, 11972 states have (on average 1.0447711326428333) internal successors, (12508), 11966 states have internal predecessors, (12508), 3684 states have call successors, (3684), 332 states have call predecessors, (3684), 2897 states have return successors, (51628), 6258 states have call predecessors, (51628), 3673 states have call successors, (51628) [2021-12-19 15:00:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18557 states to 18557 states and 67820 transitions. [2021-12-19 15:00:30,605 INFO L78 Accepts]: Start accepts. Automaton has 18557 states and 67820 transitions. Word has length 60 [2021-12-19 15:00:30,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:30,606 INFO L470 AbstractCegarLoop]: Abstraction has 18557 states and 67820 transitions. [2021-12-19 15:00:30,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 15:00:30,606 INFO L276 IsEmpty]: Start isEmpty. Operand 18557 states and 67820 transitions. [2021-12-19 15:00:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-19 15:00:30,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:30,612 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:30,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:30,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:30,827 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:30,828 INFO L85 PathProgramCache]: Analyzing trace with hash 55857866, now seen corresponding path program 2 times [2021-12-19 15:00:30,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:30,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327192579] [2021-12-19 15:00:30,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:30,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:30,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:30,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:30,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:30,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:30,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:00:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-19 15:00:30,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:30,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327192579] [2021-12-19 15:00:30,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327192579] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:30,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753517231] [2021-12-19 15:00:30,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 15:00:30,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:30,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:30,997 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:30,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-19 15:00:31,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 15:00:31,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:31,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-19 15:00:31,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-19 15:00:31,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-19 15:00:32,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753517231] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:32,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:32,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2021-12-19 15:00:32,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636880560] [2021-12-19 15:00:32,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:32,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-19 15:00:32,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:32,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-19 15:00:32,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-12-19 15:00:32,203 INFO L87 Difference]: Start difference. First operand 18557 states and 67820 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-19 15:00:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:33,918 INFO L93 Difference]: Finished difference Result 29009 states and 107470 transitions. [2021-12-19 15:00:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-19 15:00:33,919 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 73 [2021-12-19 15:00:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:33,973 INFO L225 Difference]: With dead ends: 29009 [2021-12-19 15:00:33,973 INFO L226 Difference]: Without dead ends: 10982 [2021-12-19 15:00:34,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2021-12-19 15:00:34,166 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 159 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:34,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 307 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 15:00:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10982 states. [2021-12-19 15:00:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10982 to 10399. [2021-12-19 15:00:34,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10399 states, 7045 states have (on average 1.0679914833215045) internal successors, (7524), 7211 states have internal predecessors, (7524), 2051 states have call successors, (2051), 356 states have call predecessors, (2051), 1299 states have return successors, (6727), 2831 states have call predecessors, (6727), 2043 states have call successors, (6727) [2021-12-19 15:00:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 16302 transitions. [2021-12-19 15:00:34,769 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 16302 transitions. Word has length 73 [2021-12-19 15:00:34,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:34,770 INFO L470 AbstractCegarLoop]: Abstraction has 10399 states and 16302 transitions. [2021-12-19 15:00:34,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-19 15:00:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 16302 transitions. [2021-12-19 15:00:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-19 15:00:34,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:34,775 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:34,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:34,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:34,989 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:34,990 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2021-12-19 15:00:34,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:34,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645303055] [2021-12-19 15:00:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:34,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:35,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:35,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:35,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:35,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645303055] [2021-12-19 15:00:35,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645303055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:35,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91183743] [2021-12-19 15:00:35,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 15:00:35,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:35,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:35,146 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:35,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-19 15:00:35,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-19 15:00:35,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:35,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-19 15:00:35,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:35,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 15:00:35,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91183743] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:35,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:35,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-12-19 15:00:35,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670136420] [2021-12-19 15:00:35,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:35,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-19 15:00:35,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:35,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-19 15:00:35,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-12-19 15:00:35,699 INFO L87 Difference]: Start difference. First operand 10399 states and 16302 transitions. Second operand has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 15:00:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:36,636 INFO L93 Difference]: Finished difference Result 11154 states and 17444 transitions. [2021-12-19 15:00:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-19 15:00:36,637 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2021-12-19 15:00:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:36,664 INFO L225 Difference]: With dead ends: 11154 [2021-12-19 15:00:36,664 INFO L226 Difference]: Without dead ends: 11153 [2021-12-19 15:00:36,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=577, Invalid=1973, Unknown=0, NotChecked=0, Total=2550 [2021-12-19 15:00:36,668 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 209 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:36,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 224 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 15:00:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11153 states. [2021-12-19 15:00:37,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11153 to 10507. [2021-12-19 15:00:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10507 states, 7117 states have (on average 1.0647744836307433) internal successors, (7578), 7283 states have internal predecessors, (7578), 2051 states have call successors, (2051), 356 states have call predecessors, (2051), 1335 states have return successors, (6821), 2867 states have call predecessors, (6821), 2043 states have call successors, (6821) [2021-12-19 15:00:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10507 states to 10507 states and 16450 transitions. [2021-12-19 15:00:37,128 INFO L78 Accepts]: Start accepts. Automaton has 10507 states and 16450 transitions. Word has length 69 [2021-12-19 15:00:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:37,129 INFO L470 AbstractCegarLoop]: Abstraction has 10507 states and 16450 transitions. [2021-12-19 15:00:37,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-19 15:00:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 10507 states and 16450 transitions. [2021-12-19 15:00:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-19 15:00:37,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:37,132 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:37,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:37,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:37,355 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:37,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1324062136, now seen corresponding path program 2 times [2021-12-19 15:00:37,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:37,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588662119] [2021-12-19 15:00:37,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:37,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:37,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:37,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:37,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:37,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:37,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:37,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:00:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:37,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-19 15:00:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 82 proven. 24 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-19 15:00:37,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:37,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588662119] [2021-12-19 15:00:37,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588662119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:37,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687749736] [2021-12-19 15:00:37,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 15:00:37,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:37,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:37,445 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:37,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-19 15:00:37,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 15:00:37,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:37,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 15:00:37,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 82 proven. 15 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-19 15:00:37,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 82 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-19 15:00:37,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687749736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:37,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:37,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2021-12-19 15:00:37,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270732806] [2021-12-19 15:00:37,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:37,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-19 15:00:37,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:37,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-19 15:00:37,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-19 15:00:37,989 INFO L87 Difference]: Start difference. First operand 10507 states and 16450 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-19 15:00:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:38,464 INFO L93 Difference]: Finished difference Result 21303 states and 37540 transitions. [2021-12-19 15:00:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-19 15:00:38,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 80 [2021-12-19 15:00:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:38,512 INFO L225 Difference]: With dead ends: 21303 [2021-12-19 15:00:38,512 INFO L226 Difference]: Without dead ends: 11691 [2021-12-19 15:00:38,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-12-19 15:00:38,550 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:38,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 81 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 15:00:38,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11691 states. [2021-12-19 15:00:39,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11691 to 10501. [2021-12-19 15:00:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10501 states, 7114 states have (on average 1.064801799269047) internal successors, (7575), 7280 states have internal predecessors, (7575), 2048 states have call successors, (2048), 356 states have call predecessors, (2048), 1335 states have return successors, (6741), 2864 states have call predecessors, (6741), 2013 states have call successors, (6741) [2021-12-19 15:00:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10501 states to 10501 states and 16364 transitions. [2021-12-19 15:00:39,148 INFO L78 Accepts]: Start accepts. Automaton has 10501 states and 16364 transitions. Word has length 80 [2021-12-19 15:00:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:39,148 INFO L470 AbstractCegarLoop]: Abstraction has 10501 states and 16364 transitions. [2021-12-19 15:00:39,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2021-12-19 15:00:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 10501 states and 16364 transitions. [2021-12-19 15:00:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-19 15:00:39,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:39,153 INFO L514 BasicCegarLoop]: trace histogram [11, 9, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:39,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:39,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:39,376 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:39,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:39,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2021-12-19 15:00:39,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:39,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214356361] [2021-12-19 15:00:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:39,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:39,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:39,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:39,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:39,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:39,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:39,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:39,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:00:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:39,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-19 15:00:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:39,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-19 15:00:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-19 15:00:39,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:39,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214356361] [2021-12-19 15:00:39,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214356361] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:39,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174676196] [2021-12-19 15:00:39,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 15:00:39,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:39,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:39,512 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:39,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-19 15:00:39,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-19 15:00:39,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:39,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-19 15:00:39,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-19 15:00:39,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-19 15:00:40,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174676196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:40,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:40,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2021-12-19 15:00:40,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548095283] [2021-12-19 15:00:40,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:40,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-19 15:00:40,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:40,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-19 15:00:40,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-19 15:00:40,428 INFO L87 Difference]: Start difference. First operand 10501 states and 16364 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-19 15:00:41,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:41,102 INFO L93 Difference]: Finished difference Result 24332 states and 49250 transitions. [2021-12-19 15:00:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-19 15:00:41,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 99 [2021-12-19 15:00:41,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:41,161 INFO L225 Difference]: With dead ends: 24332 [2021-12-19 15:00:41,161 INFO L226 Difference]: Without dead ends: 14755 [2021-12-19 15:00:41,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-12-19 15:00:41,202 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 109 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:41,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 136 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 15:00:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14755 states. [2021-12-19 15:00:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14755 to 14389. [2021-12-19 15:00:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14389 states, 9709 states have (on average 1.0530435678236687) internal successors, (10224), 9968 states have internal predecessors, (10224), 2881 states have call successors, (2881), 496 states have call predecessors, (2881), 1795 states have return successors, (9707), 3924 states have call predecessors, (9707), 2826 states have call successors, (9707) [2021-12-19 15:00:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14389 states to 14389 states and 22812 transitions. [2021-12-19 15:00:41,951 INFO L78 Accepts]: Start accepts. Automaton has 14389 states and 22812 transitions. Word has length 99 [2021-12-19 15:00:41,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:41,951 INFO L470 AbstractCegarLoop]: Abstraction has 14389 states and 22812 transitions. [2021-12-19 15:00:41,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2021-12-19 15:00:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 14389 states and 22812 transitions. [2021-12-19 15:00:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-19 15:00:41,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:41,958 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 7, 7, 7, 7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:41,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:42,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-19 15:00:42,181 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:42,182 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2021-12-19 15:00:42,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:42,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838975232] [2021-12-19 15:00:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:42,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:42,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:42,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:42,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:42,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:00:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-19 15:00:42,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:42,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838975232] [2021-12-19 15:00:42,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838975232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:42,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785605358] [2021-12-19 15:00:42,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 15:00:42,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:42,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:42,394 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:42,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-19 15:00:42,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-19 15:00:42,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:42,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-19 15:00:42,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-19 15:00:42,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-19 15:00:42,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785605358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:42,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:42,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2021-12-19 15:00:42,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35481757] [2021-12-19 15:00:42,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:42,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-19 15:00:42,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:42,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-19 15:00:42,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-19 15:00:42,934 INFO L87 Difference]: Start difference. First operand 14389 states and 22812 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-19 15:00:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:44,632 INFO L93 Difference]: Finished difference Result 25356 states and 43274 transitions. [2021-12-19 15:00:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-19 15:00:44,632 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 88 [2021-12-19 15:00:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:44,702 INFO L225 Difference]: With dead ends: 25356 [2021-12-19 15:00:44,703 INFO L226 Difference]: Without dead ends: 13111 [2021-12-19 15:00:44,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=989, Invalid=3433, Unknown=0, NotChecked=0, Total=4422 [2021-12-19 15:00:44,775 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 200 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:44,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 144 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-19 15:00:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13111 states. [2021-12-19 15:00:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13111 to 11133. [2021-12-19 15:00:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11133 states, 7576 states have (on average 1.046066525871172) internal successors, (7925), 7824 states have internal predecessors, (7925), 2175 states have call successors, (2175), 424 states have call predecessors, (2175), 1378 states have return successors, (5289), 2884 states have call predecessors, (5289), 2141 states have call successors, (5289) [2021-12-19 15:00:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11133 states to 11133 states and 15389 transitions. [2021-12-19 15:00:45,388 INFO L78 Accepts]: Start accepts. Automaton has 11133 states and 15389 transitions. Word has length 88 [2021-12-19 15:00:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:45,388 INFO L470 AbstractCegarLoop]: Abstraction has 11133 states and 15389 transitions. [2021-12-19 15:00:45,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-19 15:00:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand 11133 states and 15389 transitions. [2021-12-19 15:00:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-19 15:00:45,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:45,392 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:45,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:45,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-19 15:00:45,614 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:45,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:45,615 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2021-12-19 15:00:45,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:45,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087726063] [2021-12-19 15:00:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:45,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:45,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-19 15:00:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:45,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:45,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:45,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:00:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:45,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:00:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:45,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:00:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:45,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-19 15:00:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:45,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-19 15:00:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-19 15:00:45,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087726063] [2021-12-19 15:00:45,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087726063] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909254993] [2021-12-19 15:00:45,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-19 15:00:45,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:45,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:45,827 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:45,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-19 15:00:45,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-19 15:00:45,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:45,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-19 15:00:45,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-19 15:00:46,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-19 15:00:47,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909254993] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:47,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:47,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2021-12-19 15:00:47,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776556733] [2021-12-19 15:00:47,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:47,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-19 15:00:47,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:47,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-19 15:00:47,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-12-19 15:00:47,329 INFO L87 Difference]: Start difference. First operand 11133 states and 15389 transitions. Second operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-19 15:00:51,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:51,245 INFO L93 Difference]: Finished difference Result 34661 states and 55072 transitions. [2021-12-19 15:00:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-19 15:00:51,246 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 90 [2021-12-19 15:00:51,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:51,576 INFO L225 Difference]: With dead ends: 34661 [2021-12-19 15:00:51,577 INFO L226 Difference]: Without dead ends: 33559 [2021-12-19 15:00:51,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12303 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5458, Invalid=27122, Unknown=0, NotChecked=0, Total=32580 [2021-12-19 15:00:51,598 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 341 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 1625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 2728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1625 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:51,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 239 Invalid, 2728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1625 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-19 15:00:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33559 states. [2021-12-19 15:00:52,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33559 to 21083. [2021-12-19 15:00:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21083 states, 13668 states have (on average 1.0274363476733976) internal successors, (14043), 13899 states have internal predecessors, (14043), 4366 states have call successors, (4366), 532 states have call predecessors, (4366), 3045 states have return successors, (14390), 6651 states have call predecessors, (14390), 4312 states have call successors, (14390) [2021-12-19 15:00:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21083 states to 21083 states and 32799 transitions. [2021-12-19 15:00:52,781 INFO L78 Accepts]: Start accepts. Automaton has 21083 states and 32799 transitions. Word has length 90 [2021-12-19 15:00:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:52,782 INFO L470 AbstractCegarLoop]: Abstraction has 21083 states and 32799 transitions. [2021-12-19 15:00:52,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2021-12-19 15:00:52,782 INFO L276 IsEmpty]: Start isEmpty. Operand 21083 states and 32799 transitions. [2021-12-19 15:00:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-19 15:00:52,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:52,789 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:52,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:52,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-19 15:00:52,990 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:52,990 INFO L85 PathProgramCache]: Analyzing trace with hash -165426143, now seen corresponding path program 3 times [2021-12-19 15:00:52,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:52,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235900281] [2021-12-19 15:00:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:52,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:53,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:53,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235900281] [2021-12-19 15:00:53,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235900281] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:53,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36406076] [2021-12-19 15:00:53,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 15:00:53,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:53,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:00:53,374 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:00:53,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-19 15:00:53,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-19 15:00:53,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:00:53,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-19 15:00:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:00:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:53,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:00:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 15:00:54,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36406076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:00:54,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:00:54,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2021-12-19 15:00:54,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975545864] [2021-12-19 15:00:54,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:00:54,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-19 15:00:54,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:00:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-19 15:00:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=3036, Unknown=0, NotChecked=0, Total=4032 [2021-12-19 15:00:54,533 INFO L87 Difference]: Start difference. First operand 21083 states and 32799 transitions. Second operand has 64 states, 61 states have (on average 3.5245901639344264) internal successors, (215), 34 states have internal predecessors, (215), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:57,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:00:57,646 INFO L93 Difference]: Finished difference Result 36172 states and 56287 transitions. [2021-12-19 15:00:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-19 15:00:57,647 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 3.5245901639344264) internal successors, (215), 34 states have internal predecessors, (215), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-19 15:00:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:00:57,776 INFO L225 Difference]: With dead ends: 36172 [2021-12-19 15:00:57,776 INFO L226 Difference]: Without dead ends: 36171 [2021-12-19 15:00:57,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4654, Invalid=10352, Unknown=0, NotChecked=0, Total=15006 [2021-12-19 15:00:57,800 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1377 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-19 15:00:57,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 991 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-19 15:00:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36171 states. [2021-12-19 15:00:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36171 to 36171. [2021-12-19 15:00:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36171 states, 23412 states have (on average 1.0283188108662225) internal successors, (24075), 23931 states have internal predecessors, (24075), 7326 states have call successors, (7326), 820 states have call predecessors, (7326), 5429 states have return successors, (24870), 11419 states have call predecessors, (24870), 7272 states have call successors, (24870) [2021-12-19 15:00:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36171 states to 36171 states and 56271 transitions. [2021-12-19 15:00:59,505 INFO L78 Accepts]: Start accepts. Automaton has 36171 states and 56271 transitions. Word has length 124 [2021-12-19 15:00:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:00:59,505 INFO L470 AbstractCegarLoop]: Abstraction has 36171 states and 56271 transitions. [2021-12-19 15:00:59,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 3.5245901639344264) internal successors, (215), 34 states have internal predecessors, (215), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:00:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 36171 states and 56271 transitions. [2021-12-19 15:00:59,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-19 15:00:59,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:00:59,514 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-19 15:00:59,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-19 15:00:59,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:59,738 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:00:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:00:59,738 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2021-12-19 15:00:59,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:00:59,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212445257] [2021-12-19 15:00:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:00:59,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:00:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:00:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-19 15:00:59,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:00:59,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212445257] [2021-12-19 15:00:59,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212445257] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:00:59,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188854420] [2021-12-19 15:00:59,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 15:00:59,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:00:59,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:01:00,000 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:01:00,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-19 15:01:00,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 15:01:00,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 15:01:00,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-19 15:01:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:01:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-19 15:01:00,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:01:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-19 15:01:01,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188854420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:01:01,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:01:01,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-19 15:01:01,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842938536] [2021-12-19 15:01:01,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:01:01,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-19 15:01:01,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:01:01,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-19 15:01:01,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-19 15:01:01,065 INFO L87 Difference]: Start difference. First operand 36171 states and 56271 transitions. Second operand has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:01:04,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:01:04,859 INFO L93 Difference]: Finished difference Result 81584 states and 127861 transitions. [2021-12-19 15:01:04,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-19 15:01:04,860 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-19 15:01:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:01:05,168 INFO L225 Difference]: With dead ends: 81584 [2021-12-19 15:01:05,168 INFO L226 Difference]: Without dead ends: 81583 [2021-12-19 15:01:05,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-12-19 15:01:05,212 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1649 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-19 15:01:05,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1652 Valid, 601 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-19 15:01:05,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81583 states. [2021-12-19 15:01:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81583 to 81531. [2021-12-19 15:01:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81531 states, 52896 states have (on average 1.0290948275862069) internal successors, (54435), 54099 states have internal predecessors, (54435), 16494 states have call successors, (16494), 1900 states have call predecessors, (16494), 12137 states have return successors, (56910), 25531 states have call predecessors, (56910), 16380 states have call successors, (56910) [2021-12-19 15:01:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81531 states to 81531 states and 127839 transitions. [2021-12-19 15:01:09,399 INFO L78 Accepts]: Start accepts. Automaton has 81531 states and 127839 transitions. Word has length 142 [2021-12-19 15:01:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 15:01:09,400 INFO L470 AbstractCegarLoop]: Abstraction has 81531 states and 127839 transitions. [2021-12-19 15:01:09,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 15:01:09,400 INFO L276 IsEmpty]: Start isEmpty. Operand 81531 states and 127839 transitions. [2021-12-19 15:01:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-19 15:01:09,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 15:01:09,415 INFO L514 BasicCegarLoop]: trace histogram [25, 18, 17, 14, 14, 14, 13, 13, 13, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-19 15:01:09,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-19 15:01:09,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-19 15:01:09,616 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-19 15:01:09,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 15:01:09,616 INFO L85 PathProgramCache]: Analyzing trace with hash 135385807, now seen corresponding path program 1 times [2021-12-19 15:01:09,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 15:01:09,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040809551] [2021-12-19 15:01:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:01:09,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 15:01:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-19 15:01:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:01:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:01:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:01:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:01:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:01:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:01:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-19 15:01:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:01:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:01:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:01:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-19 15:01:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-19 15:01:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-19 15:01:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-19 15:01:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-19 15:01:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-19 15:01:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 597 proven. 214 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-12-19 15:01:09,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 15:01:09,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040809551] [2021-12-19 15:01:09,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040809551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 15:01:09,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324829323] [2021-12-19 15:01:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 15:01:09,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 15:01:09,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 15:01:09,969 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 15:01:09,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-19 15:01:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 15:01:10,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-19 15:01:10,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 15:01:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 585 proven. 216 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2021-12-19 15:01:10,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 15:01:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 601 proven. 263 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-12-19 15:01:12,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324829323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 15:01:12,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 15:01:12,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2021-12-19 15:01:12,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773554355] [2021-12-19 15:01:12,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 15:01:12,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-19 15:01:12,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 15:01:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-19 15:01:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-12-19 15:01:12,825 INFO L87 Difference]: Start difference. First operand 81531 states and 127839 transitions. Second operand has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2021-12-19 15:01:18,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 15:01:18,717 INFO L93 Difference]: Finished difference Result 191463 states and 387224 transitions. [2021-12-19 15:01:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-19 15:01:18,718 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 225 [2021-12-19 15:01:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 15:01:19,687 INFO L225 Difference]: With dead ends: 191463 [2021-12-19 15:01:19,688 INFO L226 Difference]: Without dead ends: 119291 [2021-12-19 15:01:20,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 480 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2021-12-19 15:01:20,084 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-19 15:01:20,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 291 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-19 15:01:20,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119291 states.