./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/Ackermann01-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-numeric/Ackermann01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:27:25,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:27:25,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:27:25,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:27:25,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:27:25,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:27:25,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:27:25,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:27:25,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:27:25,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:27:25,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:27:25,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:27:25,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:27:25,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:27:25,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:27:25,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:27:25,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:27:25,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:27:25,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:27:25,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:27:25,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:27:25,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:27:25,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:27:25,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:27:25,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:27:25,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:27:25,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:27:25,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:27:25,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:27:25,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:27:25,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:27:25,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:27:25,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:27:25,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:27:25,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:27:25,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:27:25,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:27:25,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:27:25,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:27:25,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:27:25,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:27:25,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-22 19:27:25,164 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:27:25,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:27:25,165 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:27:25,165 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:27:25,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 19:27:25,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 19:27:25,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:27:25,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:27:25,167 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:27:25,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:27:25,168 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:27:25,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:27:25,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:27:25,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 19:27:25,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 19:27:25,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 19:27:25,168 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-22 19:27:25,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 19:27:25,169 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:27:25,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 19:27:25,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:27:25,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:27:25,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 19:27:25,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:27:25,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:27:25,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 19:27:25,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 19:27:25,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:27:25,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 19:27:25,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 19:27:25,171 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:27:25,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 [2021-12-22 19:27:25,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:27:25,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:27:25,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:27:25,383 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:27:25,383 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:27:25,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2021-12-22 19:27:25,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/921160a4f/98f9557a55534d849bbda67441752740/FLAGe5f37c02a [2021-12-22 19:27:25,789 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:27:25,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2021-12-22 19:27:25,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/921160a4f/98f9557a55534d849bbda67441752740/FLAGe5f37c02a [2021-12-22 19:27:25,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/921160a4f/98f9557a55534d849bbda67441752740 [2021-12-22 19:27:25,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:27:25,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:27:25,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:27:25,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:27:25,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:27:25,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:27:25" (1/1) ... [2021-12-22 19:27:25,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f20e2b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:25, skipping insertion in model container [2021-12-22 19:27:25,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:27:25" (1/1) ... [2021-12-22 19:27:25,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:27:25,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:27:25,978 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/termination-numeric/Ackermann01-1.c[944,957] [2021-12-22 19:27:25,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:27:25,987 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:27:26,008 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/termination-numeric/Ackermann01-1.c[944,957] [2021-12-22 19:27:26,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:27:26,019 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:27:26,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:26 WrapperNode [2021-12-22 19:27:26,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:27:26,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:27:26,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:27:26,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:27:26,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:26" (1/1) ... [2021-12-22 19:27:26,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:26" (1/1) ... [2021-12-22 19:27:26,045 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-12-22 19:27:26,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:27:26,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:27:26,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:27:26,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:27:26,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:26" (1/1) ... [2021-12-22 19:27:26,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:26" (1/1) ... [2021-12-22 19:27:26,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:26" (1/1) ... [2021-12-22 19:27:26,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:26" (1/1) ... [2021-12-22 19:27:26,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:26" (1/1) ... [2021-12-22 19:27:26,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:26" (1/1) ... [2021-12-22 19:27:26,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:26" (1/1) ... [2021-12-22 19:27:26,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:27:26,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:27:26,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:27:26,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:27:26,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:26" (1/1) ... [2021-12-22 19:27:26,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:27:26,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:26,152 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) [2021-12-22 19:27:26,174 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 [2021-12-22 19:27:26,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 19:27:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:27:26,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:27:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-12-22 19:27:26,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-12-22 19:27:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 19:27:26,231 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:27:26,232 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:27:26,368 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:27:26,372 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:27:26,372 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 19:27:26,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:27:26 BoogieIcfgContainer [2021-12-22 19:27:26,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:27:26,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 19:27:26,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 19:27:26,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 19:27:26,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:27:25" (1/3) ... [2021-12-22 19:27:26,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e6823b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:27:26, skipping insertion in model container [2021-12-22 19:27:26,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:26" (2/3) ... [2021-12-22 19:27:26,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e6823b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:27:26, skipping insertion in model container [2021-12-22 19:27:26,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:27:26" (3/3) ... [2021-12-22 19:27:26,396 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-1.c [2021-12-22 19:27:26,399 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 19:27:26,399 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-12-22 19:27:26,429 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 19:27:26,433 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 [2021-12-22 19:27:26,439 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-12-22 19:27:26,463 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) [2021-12-22 19:27:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 19:27:26,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:26,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:26,475 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:26,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:26,478 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2021-12-22 19:27:26,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:26,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105693790] [2021-12-22 19:27:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:26,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:26,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:26,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105693790] [2021-12-22 19:27:26,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105693790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:27:26,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:27:26,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:27:26,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223315643] [2021-12-22 19:27:26,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:26,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 19:27:26,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:26,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 19:27:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:27:26,687 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) [2021-12-22 19:27:26,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:26,790 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-22 19:27:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 19:27:26,792 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 [2021-12-22 19:27:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:26,798 INFO L225 Difference]: With dead ends: 73 [2021-12-22 19:27:26,798 INFO L226 Difference]: Without dead ends: 59 [2021-12-22 19:27:26,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 19:27:26,802 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2021-12-22 19:27:26,803 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] [2021-12-22 19:27:26,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-22 19:27:26,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-12-22 19:27:26,837 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) [2021-12-22 19:27:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-12-22 19:27:26,846 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2021-12-22 19:27:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:26,846 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-12-22 19:27:26,846 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) [2021-12-22 19:27:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-12-22 19:27:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 19:27:26,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:26,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:26,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 19:27:26,849 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2021-12-22 19:27:26,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:26,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561211382] [2021-12-22 19:27:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:26,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:26,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:26,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561211382] [2021-12-22 19:27:26,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561211382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:27:26,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:27:26,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:27:26,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121945070] [2021-12-22 19:27:26,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:26,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 19:27:26,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:26,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 19:27:26,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:27:26,899 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) [2021-12-22 19:27:26,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:26,959 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-12-22 19:27:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 19:27:26,960 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 [2021-12-22 19:27:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:26,961 INFO L225 Difference]: With dead ends: 51 [2021-12-22 19:27:26,961 INFO L226 Difference]: Without dead ends: 49 [2021-12-22 19:27:26,961 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 [2021-12-22 19:27:26,962 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 [2021-12-22 19:27:26,962 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] [2021-12-22 19:27:26,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-22 19:27:26,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-22 19:27:26,968 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) [2021-12-22 19:27:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-22 19:27:26,969 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2021-12-22 19:27:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:26,969 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-22 19:27:26,969 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) [2021-12-22 19:27:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-22 19:27:26,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 19:27:26,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:26,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:26,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 19:27:26,971 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:26,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2021-12-22 19:27:26,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:26,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183900926] [2021-12-22 19:27:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:26,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:27,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:27,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183900926] [2021-12-22 19:27:27,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183900926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:27:27,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:27:27,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:27:27,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828402264] [2021-12-22 19:27:27,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:27,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 19:27:27,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:27,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 19:27:27,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:27:27,015 INFO L87 Difference]: Start difference. First operand 49 states and 61 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) [2021-12-22 19:27:27,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:27,083 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-12-22 19:27:27,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 19:27:27,084 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 [2021-12-22 19:27:27,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:27,086 INFO L225 Difference]: With dead ends: 76 [2021-12-22 19:27:27,086 INFO L226 Difference]: Without dead ends: 75 [2021-12-22 19:27:27,087 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 [2021-12-22 19:27:27,091 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:27,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 94 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:27:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-22 19:27:27,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-12-22 19:27:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 55 states have internal predecessors, (68), 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) [2021-12-22 19:27:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2021-12-22 19:27:27,103 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 9 [2021-12-22 19:27:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:27,103 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2021-12-22 19:27:27,104 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) [2021-12-22 19:27:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2021-12-22 19:27:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 19:27:27,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:27,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:27,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 19:27:27,104 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:27,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2021-12-22 19:27:27,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:27,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338278174] [2021-12-22 19:27:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:27,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:27,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:27,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338278174] [2021-12-22 19:27:27,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338278174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:27:27,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:27:27,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:27:27,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57354332] [2021-12-22 19:27:27,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:27,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 19:27:27,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:27,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 19:27:27,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:27:27,133 INFO L87 Difference]: Start difference. First operand 68 states and 87 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) [2021-12-22 19:27:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:27,181 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2021-12-22 19:27:27,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 19:27:27,182 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 [2021-12-22 19:27:27,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:27,184 INFO L225 Difference]: With dead ends: 116 [2021-12-22 19:27:27,185 INFO L226 Difference]: Without dead ends: 108 [2021-12-22 19:27:27,185 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 [2021-12-22 19:27:27,186 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:27,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 103 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:27:27,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-22 19:27:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-12-22 19:27:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.337837837837838) internal successors, (99), 81 states have internal predecessors, (99), 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) [2021-12-22 19:27:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2021-12-22 19:27:27,198 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2021-12-22 19:27:27,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:27,198 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2021-12-22 19:27:27,198 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) [2021-12-22 19:27:27,198 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2021-12-22 19:27:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 19:27:27,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:27,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:27,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 19:27:27,199 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:27,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:27,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1072007509, now seen corresponding path program 1 times [2021-12-22 19:27:27,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:27,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710286365] [2021-12-22 19:27:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:27,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:27,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:27,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710286365] [2021-12-22 19:27:27,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710286365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:27:27,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:27:27,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:27:27,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475091367] [2021-12-22 19:27:27,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:27,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 19:27:27,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:27,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 19:27:27,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:27:27,235 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-22 19:27:27,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:27,288 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2021-12-22 19:27:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 19:27:27,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 12 [2021-12-22 19:27:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:27,292 INFO L225 Difference]: With dead ends: 109 [2021-12-22 19:27:27,292 INFO L226 Difference]: Without dead ends: 108 [2021-12-22 19:27:27,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 19:27:27,296 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 37 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:27,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 100 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:27:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-22 19:27:27,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-12-22 19:27:27,311 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) [2021-12-22 19:27:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2021-12-22 19:27:27,314 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 12 [2021-12-22 19:27:27,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:27,314 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2021-12-22 19:27:27,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-22 19:27:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2021-12-22 19:27:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 19:27:27,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:27,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:27,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 19:27:27,319 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2021-12-22 19:27:27,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:27,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121684475] [2021-12-22 19:27:27,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:27,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:27,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:27,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121684475] [2021-12-22 19:27:27,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121684475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:27:27,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:27:27,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:27:27,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38237863] [2021-12-22 19:27:27,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:27,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:27:27,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:27,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:27:27,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:27:27,368 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) [2021-12-22 19:27:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:27,410 INFO L93 Difference]: Finished difference Result 174 states and 233 transitions. [2021-12-22 19:27:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 19:27:27,410 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 [2021-12-22 19:27:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:27,412 INFO L225 Difference]: With dead ends: 174 [2021-12-22 19:27:27,412 INFO L226 Difference]: Without dead ends: 103 [2021-12-22 19:27:27,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:27:27,417 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:27,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 81 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:27:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-22 19:27:27,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2021-12-22 19:27:27,437 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) [2021-12-22 19:27:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-12-22 19:27:27,439 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2021-12-22 19:27:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:27,440 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-12-22 19:27:27,440 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) [2021-12-22 19:27:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-12-22 19:27:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 19:27:27,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:27,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:27,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 19:27:27,442 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:27,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:27,443 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2021-12-22 19:27:27,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:27,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956710598] [2021-12-22 19:27:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:27,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:27,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:27,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956710598] [2021-12-22 19:27:27,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956710598] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:27,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663548698] [2021-12-22 19:27:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:27,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:27,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:27,482 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) [2021-12-22 19:27:27,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 19:27:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:27,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 19:27:27,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:27,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:27,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663548698] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:27,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:27,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-22 19:27:27,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414763866] [2021-12-22 19:27:27,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:27,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 19:27:27,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 19:27:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-22 19:27:27,669 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) [2021-12-22 19:27:27,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:27,859 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2021-12-22 19:27:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 19:27:27,859 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 [2021-12-22 19:27:27,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:27,864 INFO L225 Difference]: With dead ends: 274 [2021-12-22 19:27:27,864 INFO L226 Difference]: Without dead ends: 272 [2021-12-22 19:27:27,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-22 19:27:27,865 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 217 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:27,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 215 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:27:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-22 19:27:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2021-12-22 19:27:27,902 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) [2021-12-22 19:27:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2021-12-22 19:27:27,906 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2021-12-22 19:27:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:27,906 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2021-12-22 19:27:27,906 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) [2021-12-22 19:27:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2021-12-22 19:27:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 19:27:27,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:27,907 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:27,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:28,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:28,118 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:28,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:28,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2021-12-22 19:27:28,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:28,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663964652] [2021-12-22 19:27:28,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:28,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:28,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:28,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663964652] [2021-12-22 19:27:28,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663964652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:28,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974863320] [2021-12-22 19:27:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:28,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:28,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:28,167 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) [2021-12-22 19:27:28,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 19:27:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:28,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:27:28,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:28,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:27:28,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974863320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:27:28,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 19:27:28,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-12-22 19:27:28,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114308476] [2021-12-22 19:27:28,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:28,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 19:27:28,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 19:27:28,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-22 19:27:28,233 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:27:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:28,306 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2021-12-22 19:27:28,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 19:27:28,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-22 19:27:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:28,308 INFO L225 Difference]: With dead ends: 328 [2021-12-22 19:27:28,308 INFO L226 Difference]: Without dead ends: 327 [2021-12-22 19:27:28,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-22 19:27:28,309 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:28,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 102 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:27:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-22 19:27:28,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2021-12-22 19:27:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-22 19:27:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2021-12-22 19:27:28,326 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2021-12-22 19:27:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:28,327 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2021-12-22 19:27:28,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:27:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2021-12-22 19:27:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 19:27:28,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:28,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:28,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:28,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-22 19:27:28,544 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:28,544 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2021-12-22 19:27:28,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:28,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575332409] [2021-12-22 19:27:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:28,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:28,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:28,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575332409] [2021-12-22 19:27:28,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575332409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:28,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408694496] [2021-12-22 19:27:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:28,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:28,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:28,589 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) [2021-12-22 19:27:28,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 19:27:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:28,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 19:27:28,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:28,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:28,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408694496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:28,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:28,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-22 19:27:28,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338945221] [2021-12-22 19:27:28,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:28,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 19:27:28,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:28,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 19:27:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-22 19:27:28,710 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-12-22 19:27:28,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:28,877 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2021-12-22 19:27:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 19:27:28,878 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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 20 [2021-12-22 19:27:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:28,882 INFO L225 Difference]: With dead ends: 591 [2021-12-22 19:27:28,882 INFO L226 Difference]: Without dead ends: 590 [2021-12-22 19:27:28,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-22 19:27:28,884 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 240 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:28,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 164 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:27:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-12-22 19:27:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2021-12-22 19:27:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2021-12-22 19:27:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2021-12-22 19:27:28,924 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2021-12-22 19:27:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:28,924 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2021-12-22 19:27:28,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2021-12-22 19:27:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2021-12-22 19:27:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 19:27:28,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:28,927 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] [2021-12-22 19:27:28,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:29,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:29,144 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:29,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2021-12-22 19:27:29,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:29,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235599933] [2021-12-22 19:27:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:29,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:29,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:27:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 19:27:29,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:29,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235599933] [2021-12-22 19:27:29,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235599933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:29,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448209492] [2021-12-22 19:27:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:29,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:29,189 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) [2021-12-22 19:27:29,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 19:27:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:29,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 19:27:29,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:27:29,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:27:29,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448209492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:29,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:29,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2021-12-22 19:27:29,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426536681] [2021-12-22 19:27:29,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:29,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 19:27:29,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:29,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 19:27:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-12-22 19:27:29,428 INFO L87 Difference]: Start difference. First operand 521 states and 649 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) [2021-12-22 19:27:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:29,918 INFO L93 Difference]: Finished difference Result 1286 states and 1798 transitions. [2021-12-22 19:27:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 19:27:29,918 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 [2021-12-22 19:27:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:29,922 INFO L225 Difference]: With dead ends: 1286 [2021-12-22 19:27:29,922 INFO L226 Difference]: Without dead ends: 895 [2021-12-22 19:27:29,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 19:27:29,925 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 220 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:29,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 99 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 19:27:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-12-22 19:27:29,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 701. [2021-12-22 19:27:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 547 states have (on average 1.1956124314442413) internal successors, (654), 571 states have internal predecessors, (654), 102 states have call successors, (102), 44 states have call predecessors, (102), 46 states have return successors, (106), 85 states have call predecessors, (106), 78 states have call successors, (106) [2021-12-22 19:27:29,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 862 transitions. [2021-12-22 19:27:29,964 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 862 transitions. Word has length 24 [2021-12-22 19:27:29,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:29,965 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 862 transitions. [2021-12-22 19:27:29,965 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) [2021-12-22 19:27:29,965 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 862 transitions. [2021-12-22 19:27:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 19:27:29,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:29,966 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] [2021-12-22 19:27:29,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:30,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:30,185 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:30,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:30,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2021-12-22 19:27:30,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:30,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843420487] [2021-12-22 19:27:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:30,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:30,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:27:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 19:27:30,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:30,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843420487] [2021-12-22 19:27:30,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843420487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:30,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284642195] [2021-12-22 19:27:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:30,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:30,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:30,239 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) [2021-12-22 19:27:30,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 19:27:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:30,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 19:27:30,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 19:27:30,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 19:27:30,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284642195] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:30,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 19:27:30,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2021-12-22 19:27:30,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539071584] [2021-12-22 19:27:30,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:30,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 19:27:30,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:30,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 19:27:30,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 19:27:30,424 INFO L87 Difference]: Start difference. First operand 701 states and 862 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:27:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:30,567 INFO L93 Difference]: Finished difference Result 776 states and 987 transitions. [2021-12-22 19:27:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 19:27:30,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-22 19:27:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:30,570 INFO L225 Difference]: With dead ends: 776 [2021-12-22 19:27:30,571 INFO L226 Difference]: Without dead ends: 775 [2021-12-22 19:27:30,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-12-22 19:27:30,571 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 65 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:30,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 109 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:27:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-12-22 19:27:30,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 722. [2021-12-22 19:27:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 568 states have (on average 1.1971830985915493) internal successors, (680), 589 states have internal predecessors, (680), 102 states have call successors, (102), 47 states have call predecessors, (102), 46 states have return successors, (106), 85 states have call predecessors, (106), 78 states have call successors, (106) [2021-12-22 19:27:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 888 transitions. [2021-12-22 19:27:30,609 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 888 transitions. Word has length 28 [2021-12-22 19:27:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:30,610 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 888 transitions. [2021-12-22 19:27:30,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:27:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 888 transitions. [2021-12-22 19:27:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 19:27:30,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:30,611 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] [2021-12-22 19:27:30,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:30,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 19:27:30,822 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2021-12-22 19:27:30,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:30,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750742486] [2021-12-22 19:27:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:30,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:30,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:27:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:30,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:27:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:30,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:30,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750742486] [2021-12-22 19:27:30,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750742486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:30,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100585377] [2021-12-22 19:27:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:30,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:30,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:30,900 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) [2021-12-22 19:27:30,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 19:27:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:30,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 19:27:30,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:30,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:31,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100585377] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:31,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:31,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-12-22 19:27:31,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617695520] [2021-12-22 19:27:31,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:31,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 19:27:31,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 19:27:31,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-22 19:27:31,152 INFO L87 Difference]: Start difference. First operand 722 states and 888 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) [2021-12-22 19:27:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:31,584 INFO L93 Difference]: Finished difference Result 1150 states and 1701 transitions. [2021-12-22 19:27:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 19:27:31,585 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 [2021-12-22 19:27:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:31,590 INFO L225 Difference]: With dead ends: 1150 [2021-12-22 19:27:31,590 INFO L226 Difference]: Without dead ends: 1148 [2021-12-22 19:27:31,591 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 [2021-12-22 19:27:31,592 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 147 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:31,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 209 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 19:27:31,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-12-22 19:27:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 976. [2021-12-22 19:27:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 736 states have (on average 1.1875) internal successors, (874), 768 states have internal predecessors, (874), 151 states have call successors, (151), 54 states have call predecessors, (151), 83 states have return successors, (294), 153 states have call predecessors, (294), 126 states have call successors, (294) [2021-12-22 19:27:31,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1319 transitions. [2021-12-22 19:27:31,661 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1319 transitions. Word has length 33 [2021-12-22 19:27:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:31,662 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 1319 transitions. [2021-12-22 19:27:31,662 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) [2021-12-22 19:27:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1319 transitions. [2021-12-22 19:27:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 19:27:31,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:31,665 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] [2021-12-22 19:27:31,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:31,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:31,881 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:31,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:31,882 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2021-12-22 19:27:31,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:31,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952653380] [2021-12-22 19:27:31,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:31,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:31,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:27:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:31,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:27:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:31,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:31,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952653380] [2021-12-22 19:27:31,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952653380] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:31,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451300760] [2021-12-22 19:27:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:31,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:31,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:31,960 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) [2021-12-22 19:27:31,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 19:27:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:31,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 19:27:31,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:32,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:32,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451300760] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:32,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 19:27:32,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-22 19:27:32,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140179809] [2021-12-22 19:27:32,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:32,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 19:27:32,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:32,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 19:27:32,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-22 19:27:32,217 INFO L87 Difference]: Start difference. First operand 976 states and 1319 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) [2021-12-22 19:27:32,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:32,391 INFO L93 Difference]: Finished difference Result 1019 states and 1361 transitions. [2021-12-22 19:27:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 19:27:32,392 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 [2021-12-22 19:27:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:32,396 INFO L225 Difference]: With dead ends: 1019 [2021-12-22 19:27:32,396 INFO L226 Difference]: Without dead ends: 1018 [2021-12-22 19:27:32,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-12-22 19:27:32,397 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 62 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:32,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 141 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:27:32,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-12-22 19:27:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 975. [2021-12-22 19:27:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 736 states have (on average 1.1766304347826086) internal successors, (866), 767 states have internal predecessors, (866), 151 states have call successors, (151), 54 states have call predecessors, (151), 83 states have return successors, (294), 153 states have call predecessors, (294), 126 states have call successors, (294) [2021-12-22 19:27:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1311 transitions. [2021-12-22 19:27:32,463 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1311 transitions. Word has length 34 [2021-12-22 19:27:32,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:32,463 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 1311 transitions. [2021-12-22 19:27:32,463 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) [2021-12-22 19:27:32,463 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1311 transitions. [2021-12-22 19:27:32,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 19:27:32,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:32,464 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:32,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:32,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:32,674 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:32,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:32,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2021-12-22 19:27:32,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:32,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936201557] [2021-12-22 19:27:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:32,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:32,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:27:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 19:27:32,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:32,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936201557] [2021-12-22 19:27:32,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936201557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:32,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978394076] [2021-12-22 19:27:32,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 19:27:32,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:32,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:32,743 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) [2021-12-22 19:27:32,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 19:27:32,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 19:27:32,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:27:32,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 19:27:32,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 19:27:32,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 19:27:32,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978394076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:32,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:32,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-12-22 19:27:32,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864095369] [2021-12-22 19:27:32,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:32,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 19:27:32,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 19:27:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-22 19:27:32,993 INFO L87 Difference]: Start difference. First operand 975 states and 1311 transitions. Second operand has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 19:27:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:33,309 INFO L93 Difference]: Finished difference Result 1182 states and 1575 transitions. [2021-12-22 19:27:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 19:27:33,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-12-22 19:27:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:33,313 INFO L225 Difference]: With dead ends: 1182 [2021-12-22 19:27:33,313 INFO L226 Difference]: Without dead ends: 1181 [2021-12-22 19:27:33,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2021-12-22 19:27:33,314 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 210 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:33,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 182 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:27:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-12-22 19:27:33,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1029. [2021-12-22 19:27:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 779 states have (on average 1.177150192554557) internal successors, (917), 806 states have internal predecessors, (917), 162 states have call successors, (162), 61 states have call predecessors, (162), 83 states have return successors, (294), 161 states have call predecessors, (294), 126 states have call successors, (294) [2021-12-22 19:27:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1373 transitions. [2021-12-22 19:27:33,361 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1373 transitions. Word has length 36 [2021-12-22 19:27:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:33,361 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 1373 transitions. [2021-12-22 19:27:33,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 19:27:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1373 transitions. [2021-12-22 19:27:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 19:27:33,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:33,362 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] [2021-12-22 19:27:33,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:33,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 19:27:33,576 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:33,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2021-12-22 19:27:33,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:33,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754031786] [2021-12-22 19:27:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:33,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:33,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:27:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:33,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:27:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:33,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:33,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754031786] [2021-12-22 19:27:33,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754031786] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:33,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987868350] [2021-12-22 19:27:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:33,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:33,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:33,632 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) [2021-12-22 19:27:33,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 19:27:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:33,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 19:27:33,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:33,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:33,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987868350] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:33,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 19:27:33,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2021-12-22 19:27:33,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563197966] [2021-12-22 19:27:33,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:33,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 19:27:33,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:33,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 19:27:33,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-22 19:27:33,976 INFO L87 Difference]: Start difference. First operand 1029 states and 1373 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) [2021-12-22 19:27:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:34,164 INFO L93 Difference]: Finished difference Result 1140 states and 1577 transitions. [2021-12-22 19:27:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 19:27:34,164 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 [2021-12-22 19:27:34,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:34,168 INFO L225 Difference]: With dead ends: 1140 [2021-12-22 19:27:34,168 INFO L226 Difference]: Without dead ends: 1139 [2021-12-22 19:27:34,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-12-22 19:27:34,169 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 [2021-12-22 19:27:34,169 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] [2021-12-22 19:27:34,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-12-22 19:27:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1037. [2021-12-22 19:27:34,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 787 states have (on average 1.1715374841168995) internal successors, (922), 810 states have internal predecessors, (922), 166 states have call successors, (166), 61 states have call predecessors, (166), 79 states have return successors, (234), 165 states have call predecessors, (234), 130 states have call successors, (234) [2021-12-22 19:27:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1322 transitions. [2021-12-22 19:27:34,218 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1322 transitions. Word has length 37 [2021-12-22 19:27:34,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:34,218 INFO L470 AbstractCegarLoop]: Abstraction has 1037 states and 1322 transitions. [2021-12-22 19:27:34,218 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) [2021-12-22 19:27:34,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1322 transitions. [2021-12-22 19:27:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 19:27:34,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:34,219 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:34,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:34,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 19:27:34,435 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:34,436 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2021-12-22 19:27:34,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:34,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670947835] [2021-12-22 19:27:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:34,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:34,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:34,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670947835] [2021-12-22 19:27:34,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670947835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:34,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884094533] [2021-12-22 19:27:34,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 19:27:34,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:34,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:34,516 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) [2021-12-22 19:27:34,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 19:27:34,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 19:27:34,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:27:34,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 19:27:34,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:34,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:34,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884094533] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:34,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:34,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-22 19:27:34,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773629357] [2021-12-22 19:27:34,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:34,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 19:27:34,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:34,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 19:27:34,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-22 19:27:34,789 INFO L87 Difference]: Start difference. First operand 1037 states and 1322 transitions. Second operand has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:27:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:35,257 INFO L93 Difference]: Finished difference Result 2055 states and 2762 transitions. [2021-12-22 19:27:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-22 19:27:35,257 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-22 19:27:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:35,263 INFO L225 Difference]: With dead ends: 2055 [2021-12-22 19:27:35,263 INFO L226 Difference]: Without dead ends: 2054 [2021-12-22 19:27:35,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 19:27:35,265 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 418 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:35,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 531 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 19:27:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-12-22 19:27:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1759. [2021-12-22 19:27:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1326 states have (on average 1.1463046757164403) internal successors, (1520), 1378 states have internal predecessors, (1520), 274 states have call successors, (274), 95 states have call predecessors, (274), 154 states have return successors, (409), 285 states have call predecessors, (409), 226 states have call successors, (409) [2021-12-22 19:27:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2203 transitions. [2021-12-22 19:27:35,363 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2203 transitions. Word has length 44 [2021-12-22 19:27:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:35,364 INFO L470 AbstractCegarLoop]: Abstraction has 1759 states and 2203 transitions. [2021-12-22 19:27:35,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:27:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2203 transitions. [2021-12-22 19:27:35,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 19:27:35,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:35,365 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] [2021-12-22 19:27:35,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:35,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 19:27:35,579 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:35,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:35,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2021-12-22 19:27:35,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:35,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665615622] [2021-12-22 19:27:35,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:35,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:35,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:27:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:27:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:35,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:35,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665615622] [2021-12-22 19:27:35,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665615622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:35,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895862173] [2021-12-22 19:27:35,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 19:27:35,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:35,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:35,651 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) [2021-12-22 19:27:35,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 19:27:35,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 19:27:35,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:27:35,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 19:27:35,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:35,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:35,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895862173] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:35,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:35,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-22 19:27:35,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725565912] [2021-12-22 19:27:35,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:35,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 19:27:35,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:35,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 19:27:35,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-22 19:27:35,949 INFO L87 Difference]: Start difference. First operand 1759 states and 2203 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) [2021-12-22 19:27:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:36,910 INFO L93 Difference]: Finished difference Result 3798 states and 5493 transitions. [2021-12-22 19:27:36,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-22 19:27:36,910 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 [2021-12-22 19:27:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:36,920 INFO L225 Difference]: With dead ends: 3798 [2021-12-22 19:27:36,920 INFO L226 Difference]: Without dead ends: 2636 [2021-12-22 19:27:36,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=586, Invalid=1964, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 19:27:36,927 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 230 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:36,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 315 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 19:27:36,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-12-22 19:27:37,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1939. [2021-12-22 19:27:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1464 states have (on average 1.1400273224043715) internal successors, (1669), 1522 states have internal predecessors, (1669), 298 states have call successors, (298), 109 states have call predecessors, (298), 172 states have return successors, (443), 307 states have call predecessors, (443), 245 states have call successors, (443) [2021-12-22 19:27:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 2410 transitions. [2021-12-22 19:27:37,040 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 2410 transitions. Word has length 45 [2021-12-22 19:27:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:37,040 INFO L470 AbstractCegarLoop]: Abstraction has 1939 states and 2410 transitions. [2021-12-22 19:27:37,040 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) [2021-12-22 19:27:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 2410 transitions. [2021-12-22 19:27:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 19:27:37,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:37,042 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] [2021-12-22 19:27:37,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:37,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 19:27:37,260 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:37,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash -242379077, now seen corresponding path program 1 times [2021-12-22 19:27:37,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:37,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959494738] [2021-12-22 19:27:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:37,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:37,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 19:27:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-22 19:27:37,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959494738] [2021-12-22 19:27:37,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959494738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192928427] [2021-12-22 19:27:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:37,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:37,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:37,306 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) [2021-12-22 19:27:37,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 19:27:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:37,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 19:27:37,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 19:27:37,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 19:27:37,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192928427] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:37,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:37,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2021-12-22 19:27:37,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951731632] [2021-12-22 19:27:37,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:37,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 19:27:37,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:37,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 19:27:37,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-22 19:27:37,577 INFO L87 Difference]: Start difference. First operand 1939 states and 2410 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) [2021-12-22 19:27:38,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:38,115 INFO L93 Difference]: Finished difference Result 2482 states and 3263 transitions. [2021-12-22 19:27:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-22 19:27:38,116 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 [2021-12-22 19:27:38,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:38,123 INFO L225 Difference]: With dead ends: 2482 [2021-12-22 19:27:38,123 INFO L226 Difference]: Without dead ends: 2379 [2021-12-22 19:27:38,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 19:27:38,125 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:38,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 80 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 19:27:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2021-12-22 19:27:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1873. [2021-12-22 19:27:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1411 states have (on average 1.133238837703756) internal successors, (1599), 1473 states have internal predecessors, (1599), 286 states have call successors, (286), 102 states have call predecessors, (286), 172 states have return successors, (443), 297 states have call predecessors, (443), 245 states have call successors, (443) [2021-12-22 19:27:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2328 transitions. [2021-12-22 19:27:38,236 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2328 transitions. Word has length 52 [2021-12-22 19:27:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:38,236 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 2328 transitions. [2021-12-22 19:27:38,237 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) [2021-12-22 19:27:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2328 transitions. [2021-12-22 19:27:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 19:27:38,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:38,238 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] [2021-12-22 19:27:38,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:38,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 19:27:38,451 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:38,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:38,452 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2021-12-22 19:27:38,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:38,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979926259] [2021-12-22 19:27:38,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:38,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:38,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:27:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:38,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 19:27:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:38,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:27:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:38,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 19:27:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 19:27:38,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:38,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979926259] [2021-12-22 19:27:38,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979926259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:38,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097664817] [2021-12-22 19:27:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:38,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:38,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:38,549 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) [2021-12-22 19:27:38,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 19:27:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:38,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 19:27:38,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 19:27:38,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 19:27:39,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097664817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:39,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:39,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-22 19:27:39,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269881590] [2021-12-22 19:27:39,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:39,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 19:27:39,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:39,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 19:27:39,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-22 19:27:39,075 INFO L87 Difference]: Start difference. First operand 1873 states and 2328 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) [2021-12-22 19:27:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:40,382 INFO L93 Difference]: Finished difference Result 4363 states and 7674 transitions. [2021-12-22 19:27:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-22 19:27:40,395 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 [2021-12-22 19:27:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:40,419 INFO L225 Difference]: With dead ends: 4363 [2021-12-22 19:27:40,419 INFO L226 Difference]: Without dead ends: 4361 [2021-12-22 19:27:40,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1158, Invalid=5004, Unknown=0, NotChecked=0, Total=6162 [2021-12-22 19:27:40,424 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:40,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 219 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 19:27:40,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-12-22 19:27:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3183. [2021-12-22 19:27:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 2230 states have (on average 1.1031390134529149) internal successors, (2460), 2295 states have internal predecessors, (2460), 551 states have call successors, (551), 116 states have call predecessors, (551), 398 states have return successors, (3128), 771 states have call predecessors, (3128), 508 states have call successors, (3128) [2021-12-22 19:27:40,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 6139 transitions. [2021-12-22 19:27:40,662 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 6139 transitions. Word has length 52 [2021-12-22 19:27:40,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:40,662 INFO L470 AbstractCegarLoop]: Abstraction has 3183 states and 6139 transitions. [2021-12-22 19:27:40,662 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) [2021-12-22 19:27:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 6139 transitions. [2021-12-22 19:27:40,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 19:27:40,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:40,664 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:40,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:40,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:40,875 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:40,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1812635000, now seen corresponding path program 3 times [2021-12-22 19:27:40,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:40,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537309153] [2021-12-22 19:27:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:40,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:40,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 19:27:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 75 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 19:27:40,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:40,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537309153] [2021-12-22 19:27:40,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537309153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:40,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496511331] [2021-12-22 19:27:40,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 19:27:40,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:40,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:40,963 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) [2021-12-22 19:27:40,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 19:27:40,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-22 19:27:41,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:27:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 19:27:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 75 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 19:27:41,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 19:27:41,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496511331] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:41,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:41,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2021-12-22 19:27:41,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622822592] [2021-12-22 19:27:41,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:41,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 19:27:41,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:41,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 19:27:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-12-22 19:27:41,305 INFO L87 Difference]: Start difference. First operand 3183 states and 6139 transitions. Second operand has 27 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 19 states have internal predecessors, (77), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 19:27:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:41,958 INFO L93 Difference]: Finished difference Result 3643 states and 6775 transitions. [2021-12-22 19:27:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-22 19:27:41,958 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 19 states have internal predecessors, (77), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-12-22 19:27:41,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:41,974 INFO L225 Difference]: With dead ends: 3643 [2021-12-22 19:27:41,974 INFO L226 Difference]: Without dead ends: 3642 [2021-12-22 19:27:41,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=634, Invalid=1916, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 19:27:41,979 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 398 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:41,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 201 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 19:27:41,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2021-12-22 19:27:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3211. [2021-12-22 19:27:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 2253 states have (on average 1.1034176653351087) internal successors, (2486), 2318 states have internal predecessors, (2486), 556 states have call successors, (556), 119 states have call predecessors, (556), 398 states have return successors, (3128), 773 states have call predecessors, (3128), 508 states have call successors, (3128) [2021-12-22 19:27:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 6170 transitions. [2021-12-22 19:27:42,216 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 6170 transitions. Word has length 52 [2021-12-22 19:27:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:42,216 INFO L470 AbstractCegarLoop]: Abstraction has 3211 states and 6170 transitions. [2021-12-22 19:27:42,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 19 states have internal predecessors, (77), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 19:27:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 6170 transitions. [2021-12-22 19:27:42,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 19:27:42,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:42,218 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:42,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:42,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:42,424 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:42,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2021-12-22 19:27:42,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:42,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973325742] [2021-12-22 19:27:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:42,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 19:27:42,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:42,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973325742] [2021-12-22 19:27:42,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973325742] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:42,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323923745] [2021-12-22 19:27:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:42,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:42,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:42,499 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) [2021-12-22 19:27:42,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 19:27:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 19:27:42,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 19:27:42,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 19:27:42,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323923745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:42,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:42,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-22 19:27:42,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626754577] [2021-12-22 19:27:42,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:42,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 19:27:42,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:42,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 19:27:42,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-22 19:27:42,826 INFO L87 Difference]: Start difference. First operand 3211 states and 6170 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) [2021-12-22 19:27:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:43,797 INFO L93 Difference]: Finished difference Result 9377 states and 17636 transitions. [2021-12-22 19:27:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-22 19:27:43,798 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 [2021-12-22 19:27:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:43,838 INFO L225 Difference]: With dead ends: 9377 [2021-12-22 19:27:43,838 INFO L226 Difference]: Without dead ends: 9376 [2021-12-22 19:27:43,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 19:27:43,844 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 676 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:43,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 332 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 19:27:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9376 states. [2021-12-22 19:27:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9376 to 8659. [2021-12-22 19:27:44,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8659 states, 6117 states have (on average 1.1057708026810529) internal successors, (6764), 6272 states have internal predecessors, (6764), 1498 states have call successors, (1498), 347 states have call predecessors, (1498), 1040 states have return successors, (8216), 2039 states have call predecessors, (8216), 1330 states have call successors, (8216) [2021-12-22 19:27:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8659 states to 8659 states and 16478 transitions. [2021-12-22 19:27:44,516 INFO L78 Accepts]: Start accepts. Automaton has 8659 states and 16478 transitions. Word has length 58 [2021-12-22 19:27:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:44,517 INFO L470 AbstractCegarLoop]: Abstraction has 8659 states and 16478 transitions. [2021-12-22 19:27:44,517 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) [2021-12-22 19:27:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 8659 states and 16478 transitions. [2021-12-22 19:27:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 19:27:44,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:44,519 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] [2021-12-22 19:27:44,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-22 19:27:44,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:44,736 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:44,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:44,736 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2021-12-22 19:27:44,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:44,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925452149] [2021-12-22 19:27:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:44,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:44,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:27:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:44,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 19:27:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:44,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:27:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:44,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 19:27:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 19:27:44,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:44,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925452149] [2021-12-22 19:27:44,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925452149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:44,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575964267] [2021-12-22 19:27:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:44,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:44,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:44,852 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) [2021-12-22 19:27:44,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 19:27:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:44,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 19:27:44,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 19:27:44,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 19:27:45,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575964267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:45,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:45,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2021-12-22 19:27:45,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991298143] [2021-12-22 19:27:45,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:45,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 19:27:45,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:45,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 19:27:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-12-22 19:27:45,362 INFO L87 Difference]: Start difference. First operand 8659 states and 16478 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) [2021-12-22 19:27:48,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:48,338 INFO L93 Difference]: Finished difference Result 32258 states and 112587 transitions. [2021-12-22 19:27:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-22 19:27:48,339 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 [2021-12-22 19:27:48,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:48,580 INFO L225 Difference]: With dead ends: 32258 [2021-12-22 19:27:48,580 INFO L226 Difference]: Without dead ends: 24265 [2021-12-22 19:27:48,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1251, Invalid=4755, Unknown=0, NotChecked=0, Total=6006 [2021-12-22 19:27:48,706 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 135 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:48,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 356 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 19:27:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24265 states. [2021-12-22 19:27:50,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24265 to 17565. [2021-12-22 19:27:50,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17565 states, 11675 states have (on average 1.0707494646680942) internal successors, (12501), 11802 states have internal predecessors, (12501), 3307 states have call successors, (3307), 438 states have call predecessors, (3307), 2579 states have return successors, (43949), 5324 states have call predecessors, (43949), 3113 states have call successors, (43949) [2021-12-22 19:27:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17565 states to 17565 states and 59757 transitions. [2021-12-22 19:27:51,051 INFO L78 Accepts]: Start accepts. Automaton has 17565 states and 59757 transitions. Word has length 56 [2021-12-22 19:27:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:51,051 INFO L470 AbstractCegarLoop]: Abstraction has 17565 states and 59757 transitions. [2021-12-22 19:27:51,052 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) [2021-12-22 19:27:51,052 INFO L276 IsEmpty]: Start isEmpty. Operand 17565 states and 59757 transitions. [2021-12-22 19:27:51,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-22 19:27:51,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:51,055 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:51,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:51,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-22 19:27:51,272 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:51,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2027008992, now seen corresponding path program 2 times [2021-12-22 19:27:51,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:51,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976942465] [2021-12-22 19:27:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:51,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:51,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 19:27:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:51,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:27:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:51,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 19:27:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:51,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:27:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:51,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 19:27:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 89 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-22 19:27:51,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:51,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976942465] [2021-12-22 19:27:51,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976942465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:51,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758347348] [2021-12-22 19:27:51,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 19:27:51,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:51,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:51,406 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) [2021-12-22 19:27:51,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-22 19:27:51,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 19:27:51,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:27:51,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 19:27:51,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 78 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 19:27:51,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-22 19:27:52,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758347348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:52,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:52,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2021-12-22 19:27:52,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743406279] [2021-12-22 19:27:52,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:52,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 19:27:52,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 19:27:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 19:27:52,215 INFO L87 Difference]: Start difference. First operand 17565 states and 59757 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) [2021-12-22 19:27:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:54,262 INFO L93 Difference]: Finished difference Result 29426 states and 97217 transitions. [2021-12-22 19:27:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-22 19:27:54,263 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 81 [2021-12-22 19:27:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:54,326 INFO L225 Difference]: With dead ends: 29426 [2021-12-22 19:27:54,326 INFO L226 Difference]: Without dead ends: 12522 [2021-12-22 19:27:54,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=756, Invalid=3026, Unknown=0, NotChecked=0, Total=3782 [2021-12-22 19:27:54,489 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 203 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:54,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 355 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 19:27:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12522 states. [2021-12-22 19:27:55,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12522 to 11029. [2021-12-22 19:27:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11029 states, 7807 states have (on average 1.1115665428461636) internal successors, (8678), 8110 states have internal predecessors, (8678), 1942 states have call successors, (1942), 487 states have call predecessors, (1942), 1276 states have return successors, (5975), 2431 states have call predecessors, (5975), 1723 states have call successors, (5975) [2021-12-22 19:27:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11029 states to 11029 states and 16595 transitions. [2021-12-22 19:27:55,366 INFO L78 Accepts]: Start accepts. Automaton has 11029 states and 16595 transitions. Word has length 81 [2021-12-22 19:27:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:55,367 INFO L470 AbstractCegarLoop]: Abstraction has 11029 states and 16595 transitions. [2021-12-22 19:27:55,367 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) [2021-12-22 19:27:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 11029 states and 16595 transitions. [2021-12-22 19:27:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 19:27:55,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:55,371 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:55,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:55,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:55,588 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash 821485916, now seen corresponding path program 4 times [2021-12-22 19:27:55,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:55,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969259281] [2021-12-22 19:27:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:55,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:55,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 19:27:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 19:27:55,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:55,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969259281] [2021-12-22 19:27:55,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969259281] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:55,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250250498] [2021-12-22 19:27:55,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 19:27:55,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:55,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:55,717 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) [2021-12-22 19:27:55,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-22 19:27:55,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 19:27:55,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:27:55,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 19:27:55,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 106 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 19:27:55,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 106 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-22 19:27:56,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250250498] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:56,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:56,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 23 [2021-12-22 19:27:56,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347786224] [2021-12-22 19:27:56,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:56,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 19:27:56,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:56,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 19:27:56,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-22 19:27:56,014 INFO L87 Difference]: Start difference. First operand 11029 states and 16595 transitions. Second operand has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 16 states have internal predecessors, (78), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 19:27:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:56,994 INFO L93 Difference]: Finished difference Result 11563 states and 17375 transitions. [2021-12-22 19:27:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 19:27:56,995 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 16 states have internal predecessors, (78), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2021-12-22 19:27:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:57,025 INFO L225 Difference]: With dead ends: 11563 [2021-12-22 19:27:57,025 INFO L226 Difference]: Without dead ends: 9324 [2021-12-22 19:27:57,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2021-12-22 19:27:57,037 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 299 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:57,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 102 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 19:27:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2021-12-22 19:27:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 8758. [2021-12-22 19:27:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8758 states, 5964 states have (on average 1.0675720992622402) internal successors, (6367), 6090 states have internal predecessors, (6367), 1731 states have call successors, (1731), 316 states have call predecessors, (1731), 1059 states have return successors, (5687), 2351 states have call predecessors, (5687), 1723 states have call successors, (5687) [2021-12-22 19:27:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8758 states to 8758 states and 13785 transitions. [2021-12-22 19:27:57,770 INFO L78 Accepts]: Start accepts. Automaton has 8758 states and 13785 transitions. Word has length 68 [2021-12-22 19:27:57,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:57,771 INFO L470 AbstractCegarLoop]: Abstraction has 8758 states and 13785 transitions. [2021-12-22 19:27:57,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 16 states have internal predecessors, (78), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 19:27:57,771 INFO L276 IsEmpty]: Start isEmpty. Operand 8758 states and 13785 transitions. [2021-12-22 19:27:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 19:27:57,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:57,774 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] [2021-12-22 19:27:57,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:57,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:57,987 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:27:57,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:57,988 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2021-12-22 19:27:57,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:57,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247393103] [2021-12-22 19:27:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:57,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:58,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:27:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:58,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:27:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:58,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:58,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247393103] [2021-12-22 19:27:58,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247393103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:27:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911974041] [2021-12-22 19:27:58,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 19:27:58,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:58,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:58,098 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) [2021-12-22 19:27:58,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-22 19:27:58,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-22 19:27:58,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:27:58,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 19:27:58,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:58,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 19:27:58,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911974041] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:58,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:27:58,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2021-12-22 19:27:58,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27225460] [2021-12-22 19:27:58,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:58,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 19:27:58,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 19:27:58,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 19:27:58,603 INFO L87 Difference]: Start difference. First operand 8758 states and 13785 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) [2021-12-22 19:27:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:59,545 INFO L93 Difference]: Finished difference Result 9409 states and 14783 transitions. [2021-12-22 19:27:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 19:27:59,546 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 [2021-12-22 19:27:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:59,574 INFO L225 Difference]: With dead ends: 9409 [2021-12-22 19:27:59,574 INFO L226 Difference]: Without dead ends: 9408 [2021-12-22 19:27:59,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=577, Invalid=1973, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 19:27:59,582 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 296 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:59,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 227 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 19:27:59,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2021-12-22 19:28:00,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 8866. [2021-12-22 19:28:00,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8866 states, 6036 states have (on average 1.0637839628893306) internal successors, (6421), 6162 states have internal predecessors, (6421), 1731 states have call successors, (1731), 316 states have call predecessors, (1731), 1095 states have return successors, (5781), 2387 states have call predecessors, (5781), 1723 states have call successors, (5781) [2021-12-22 19:28:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8866 states to 8866 states and 13933 transitions. [2021-12-22 19:28:00,239 INFO L78 Accepts]: Start accepts. Automaton has 8866 states and 13933 transitions. Word has length 69 [2021-12-22 19:28:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:28:00,239 INFO L470 AbstractCegarLoop]: Abstraction has 8866 states and 13933 transitions. [2021-12-22 19:28:00,239 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) [2021-12-22 19:28:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 8866 states and 13933 transitions. [2021-12-22 19:28:00,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-22 19:28:00,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:28:00,242 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 7, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-22 19:28:00,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-22 19:28:00,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:28:00,455 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:28:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:28:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash 907149196, now seen corresponding path program 2 times [2021-12-22 19:28:00,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:28:00,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213518533] [2021-12-22 19:28:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:28:00,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:28:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:00,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 19:28:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:00,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:28:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:00,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 19:28:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:00,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 19:28:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:00,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:28:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:00,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 19:28:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:00,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 19:28:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 118 proven. 24 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-22 19:28:00,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:28:00,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213518533] [2021-12-22 19:28:00,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213518533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:28:00,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341374709] [2021-12-22 19:28:00,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 19:28:00,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:28:00,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:28:00,541 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) [2021-12-22 19:28:00,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-22 19:28:00,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 19:28:00,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:28:00,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 19:28:00,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:28:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 118 proven. 15 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-22 19:28:00,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:28:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 118 proven. 26 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-22 19:28:01,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341374709] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:28:01,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:28:01,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2021-12-22 19:28:01,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039071600] [2021-12-22 19:28:01,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:28:01,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 19:28:01,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:28:01,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 19:28:01,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-22 19:28:01,063 INFO L87 Difference]: Start difference. First operand 8866 states and 13933 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) [2021-12-22 19:28:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:28:01,766 INFO L93 Difference]: Finished difference Result 17989 states and 31874 transitions. [2021-12-22 19:28:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 19:28:01,767 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 96 [2021-12-22 19:28:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:28:01,800 INFO L225 Difference]: With dead ends: 17989 [2021-12-22 19:28:01,800 INFO L226 Difference]: Without dead ends: 9810 [2021-12-22 19:28:01,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-12-22 19:28:01,833 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 73 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:28:01,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 107 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:28:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-12-22 19:28:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 8860. [2021-12-22 19:28:02,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 6033 states have (on average 1.0638156804243328) internal successors, (6418), 6159 states have internal predecessors, (6418), 1728 states have call successors, (1728), 316 states have call predecessors, (1728), 1095 states have return successors, (5701), 2384 states have call predecessors, (5701), 1693 states have call successors, (5701) [2021-12-22 19:28:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 13847 transitions. [2021-12-22 19:28:02,448 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 13847 transitions. Word has length 96 [2021-12-22 19:28:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:28:02,448 INFO L470 AbstractCegarLoop]: Abstraction has 8860 states and 13847 transitions. [2021-12-22 19:28:02,448 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) [2021-12-22 19:28:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 13847 transitions. [2021-12-22 19:28:02,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-22 19:28:02,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:28:02,452 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] [2021-12-22 19:28:02,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-22 19:28:02,660 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,SelfDestructingSolverStorable25 [2021-12-22 19:28:02,660 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:28:02,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:28:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2021-12-22 19:28:02,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:28:02,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640670310] [2021-12-22 19:28:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:28:02,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:28:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:02,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:28:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:02,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 19:28:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:02,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 19:28:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:02,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:28:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:02,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 19:28:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:02,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:28:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:02,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 19:28:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:02,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 19:28:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:02,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 19:28:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-22 19:28:02,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:28:02,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640670310] [2021-12-22 19:28:02,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640670310] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:28:02,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359674026] [2021-12-22 19:28:02,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 19:28:02,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:28:02,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:28:02,781 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) [2021-12-22 19:28:02,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-22 19:28:02,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-22 19:28:02,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:28:02,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 19:28:02,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:28:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-22 19:28:02,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:28:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-22 19:28:03,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359674026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:28:03,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:28:03,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2021-12-22 19:28:03,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803643195] [2021-12-22 19:28:03,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:28:03,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 19:28:03,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:28:03,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 19:28:03,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-22 19:28:03,598 INFO L87 Difference]: Start difference. First operand 8860 states and 13847 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) [2021-12-22 19:28:04,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:28:04,464 INFO L93 Difference]: Finished difference Result 20507 states and 41561 transitions. [2021-12-22 19:28:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 19:28:04,465 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 [2021-12-22 19:28:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:28:04,518 INFO L225 Difference]: With dead ends: 20507 [2021-12-22 19:28:04,518 INFO L226 Difference]: Without dead ends: 12363 [2021-12-22 19:28:04,562 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 [2021-12-22 19:28:04,563 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 94 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:28:04,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 144 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:28:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12363 states. [2021-12-22 19:28:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12363 to 11997. [2021-12-22 19:28:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11997 states, 8101 states have (on average 1.054684606838662) internal successors, (8544), 8288 states have internal predecessors, (8544), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2021-12-22 19:28:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2021-12-22 19:28:05,422 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2021-12-22 19:28:05,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:28:05,423 INFO L470 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2021-12-22 19:28:05,423 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) [2021-12-22 19:28:05,423 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2021-12-22 19:28:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-22 19:28:05,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:28:05,430 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] [2021-12-22 19:28:05,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-22 19:28:05,643 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,SelfDestructingSolverStorable26 [2021-12-22 19:28:05,643 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:28:05,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:28:05,644 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2021-12-22 19:28:05,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:28:05,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859949812] [2021-12-22 19:28:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:28:05,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:28:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:05,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:28:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:05,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 19:28:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:05,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:28:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:05,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 19:28:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 19:28:05,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:28:05,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859949812] [2021-12-22 19:28:05,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859949812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:28:05,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696511084] [2021-12-22 19:28:05,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 19:28:05,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:28:05,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:28:05,818 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) [2021-12-22 19:28:05,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-22 19:28:05,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-22 19:28:05,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:28:05,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-22 19:28:05,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:28:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-22 19:28:06,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:28:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-22 19:28:06,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696511084] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:28:06,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:28:06,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2021-12-22 19:28:06,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497188066] [2021-12-22 19:28:06,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:28:06,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 19:28:06,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:28:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 19:28:06,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-22 19:28:06,273 INFO L87 Difference]: Start difference. First operand 11997 states and 19076 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) [2021-12-22 19:28:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:28:07,862 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2021-12-22 19:28:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-22 19:28:07,863 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 [2021-12-22 19:28:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:28:07,906 INFO L225 Difference]: With dead ends: 20852 [2021-12-22 19:28:07,906 INFO L226 Difference]: Without dead ends: 10359 [2021-12-22 19:28:07,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=989, Invalid=3433, Unknown=0, NotChecked=0, Total=4422 [2021-12-22 19:28:07,963 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 151 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 19:28:07,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 158 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 19:28:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2021-12-22 19:28:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2021-12-22 19:28:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 5968 states have (on average 1.0464142091152815) internal successors, (6245), 6144 states have internal predecessors, (6245), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2021-12-22 19:28:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2021-12-22 19:28:08,592 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2021-12-22 19:28:08,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:28:08,592 INFO L470 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2021-12-22 19:28:08,592 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) [2021-12-22 19:28:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2021-12-22 19:28:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 19:28:08,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:28:08,595 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] [2021-12-22 19:28:08,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-22 19:28:08,812 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,SelfDestructingSolverStorable27 [2021-12-22 19:28:08,812 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:28:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:28:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2021-12-22 19:28:08,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:28:08,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818868444] [2021-12-22 19:28:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:28:08,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:28:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:08,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:28:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:08,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 19:28:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:08,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 19:28:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:08,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 19:28:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:08,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:28:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:08,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 19:28:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:08,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 19:28:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:08,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 19:28:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-22 19:28:09,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:28:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818868444] [2021-12-22 19:28:09,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818868444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:28:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776370088] [2021-12-22 19:28:09,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 19:28:09,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:28:09,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:28:09,016 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) [2021-12-22 19:28:09,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-22 19:28:09,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 19:28:09,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:28:09,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 19:28:09,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:28:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-22 19:28:09,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:28:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-22 19:28:10,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776370088] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:28:10,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:28:10,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2021-12-22 19:28:10,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673543191] [2021-12-22 19:28:10,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:28:10,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-22 19:28:10,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:28:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-22 19:28:10,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 19:28:10,458 INFO L87 Difference]: Start difference. First operand 8741 states and 12053 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) [2021-12-22 19:28:14,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:28:14,801 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2021-12-22 19:28:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-22 19:28:14,801 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 [2021-12-22 19:28:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:28:14,926 INFO L225 Difference]: With dead ends: 29169 [2021-12-22 19:28:14,926 INFO L226 Difference]: Without dead ends: 28067 [2021-12-22 19:28:14,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12169 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5458, Invalid=27122, Unknown=0, NotChecked=0, Total=32580 [2021-12-22 19:28:14,954 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 219 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 897 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 897 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 19:28:14,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 338 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [897 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 19:28:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2021-12-22 19:28:16,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2021-12-22 19:28:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17311 states, 11232 states have (on average 1.0269764957264957) internal successors, (11535), 11391 states have internal predecessors, (11535), 3626 states have call successors, (3626), 460 states have call predecessors, (3626), 2449 states have return successors, (11770), 5459 states have call predecessors, (11770), 3572 states have call successors, (11770) [2021-12-22 19:28:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2021-12-22 19:28:16,465 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2021-12-22 19:28:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:28:16,483 INFO L470 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2021-12-22 19:28:16,483 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) [2021-12-22 19:28:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2021-12-22 19:28:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 19:28:16,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:28:16,486 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-22 19:28:16,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-22 19:28:16,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:28:16,702 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:28:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:28:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2021-12-22 19:28:16,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:28:16,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494899455] [2021-12-22 19:28:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:28:16,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:28:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:28:16,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:28:16,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494899455] [2021-12-22 19:28:16,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494899455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:28:16,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156558448] [2021-12-22 19:28:16,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 19:28:16,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:28:16,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:28:16,903 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) [2021-12-22 19:28:16,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-22 19:28:16,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-22 19:28:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:28:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 19:28:16,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:28:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:28:17,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:28:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:28:17,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156558448] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:28:17,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:28:17,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-22 19:28:17,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172633521] [2021-12-22 19:28:17,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:28:17,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-22 19:28:17,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:28:17,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-22 19:28:17,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-22 19:28:17,605 INFO L87 Difference]: Start difference. First operand 17311 states and 26931 transitions. Second operand has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:28:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:28:20,293 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2021-12-22 19:28:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-22 19:28:20,294 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-22 19:28:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:28:20,392 INFO L225 Difference]: With dead ends: 28628 [2021-12-22 19:28:20,392 INFO L226 Difference]: Without dead ends: 28627 [2021-12-22 19:28:20,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-12-22 19:28:20,404 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 1092 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 19:28:20,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 720 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 19:28:20,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2021-12-22 19:28:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2021-12-22 19:28:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28627 states, 18540 states have (on average 1.0279935275080907) internal successors, (19059), 18915 states have internal predecessors, (19059), 5846 states have call successors, (5846), 676 states have call predecessors, (5846), 4237 states have return successors, (19630), 9035 states have call predecessors, (19630), 5792 states have call successors, (19630) [2021-12-22 19:28:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2021-12-22 19:28:22,546 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2021-12-22 19:28:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:28:22,546 INFO L470 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2021-12-22 19:28:22,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:28:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2021-12-22 19:28:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-22 19:28:22,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:28:22,554 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-12-22 19:28:22,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-22 19:28:22,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:28:22,755 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-12-22 19:28:22,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:28:22,756 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2021-12-22 19:28:22,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:28:22,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169130409] [2021-12-22 19:28:22,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:28:22,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:28:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:28:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-22 19:28:22,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:28:22,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169130409] [2021-12-22 19:28:22,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169130409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:28:22,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992004649] [2021-12-22 19:28:22,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 19:28:22,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:28:22,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:28:22,986 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) [2021-12-22 19:28:22,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-22 19:28:23,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 19:28:23,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:28:23,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-22 19:28:23,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:28:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-22 19:28:23,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:28:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-22 19:28:23,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992004649] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:28:23,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:28:23,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-22 19:28:23,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241488733] [2021-12-22 19:28:23,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:28:23,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-22 19:28:23,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:28:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-22 19:28:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-22 19:28:23,828 INFO L87 Difference]: Start difference. First operand 28627 states and 44535 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)