/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:28:08,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:28:08,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:28:08,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:28:08,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:28:08,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:28:08,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:28:08,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:28:08,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:28:08,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:28:08,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:28:08,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:28:08,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:28:08,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:28:08,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:28:08,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:28:08,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:28:08,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:28:08,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:28:08,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:28:08,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:28:08,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:28:08,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:28:08,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:28:08,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 20:28:08,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 20:28:08,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 20:28:08,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 20:28:08,773 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 20:28:08,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 20:28:08,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 20:28:08,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 20:28:08,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 20:28:08,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 20:28:08,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 20:28:08,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 20:28:08,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 20:28:08,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 20:28:08,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:28:08,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:28:08,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:28:08,800 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:28:08,831 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:28:08,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:28:08,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:28:08,837 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:28:08,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:28:08,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:28:08,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:28:08,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:28:08,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:28:08,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:28:08,840 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:28:08,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:28:08,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:28:08,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:28:08,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:28:08,842 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:28:08,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:28:08,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:28:08,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:28:08,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:28:08,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:28:08,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:28:08,844 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:28:09,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:28:09,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:28:09,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:28:09,342 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:28:09,343 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:28:09,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2020-10-23 20:28:09,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a740d2f18/9780cc0b7c694d0eb0a74ebc421b2ac7/FLAGd0d8171e5 [2020-10-23 20:28:10,047 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:28:10,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2020-10-23 20:28:10,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a740d2f18/9780cc0b7c694d0eb0a74ebc421b2ac7/FLAGd0d8171e5 [2020-10-23 20:28:10,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a740d2f18/9780cc0b7c694d0eb0a74ebc421b2ac7 [2020-10-23 20:28:10,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:28:10,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:28:10,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:28:10,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:28:10,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:28:10,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:28:10" (1/1) ... [2020-10-23 20:28:10,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a36b760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:10, skipping insertion in model container [2020-10-23 20:28:10,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:28:10" (1/1) ... [2020-10-23 20:28:10,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:28:10,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:28:10,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:28:10,655 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:28:10,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:28:10,689 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:28:10,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:10 WrapperNode [2020-10-23 20:28:10,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:28:10,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:28:10,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:28:10,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:28:10,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:10" (1/1) ... [2020-10-23 20:28:10,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:10" (1/1) ... [2020-10-23 20:28:10,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:10" (1/1) ... [2020-10-23 20:28:10,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:10" (1/1) ... [2020-10-23 20:28:10,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:10" (1/1) ... [2020-10-23 20:28:10,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:10" (1/1) ... [2020-10-23 20:28:10,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:10" (1/1) ... [2020-10-23 20:28:10,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:28:10,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:28:10,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:28:10,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:28:10,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:28:10,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:28:10,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:28:10,858 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:28:10,858 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-23 20:28:10,858 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:28:10,858 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:28:10,858 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:28:10,859 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:28:10,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:28:10,859 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-23 20:28:10,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:28:10,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:28:10,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:28:10,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:28:10,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:28:10,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:28:10,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:28:11,165 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:28:11,165 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:28:11,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:28:11 BoogieIcfgContainer [2020-10-23 20:28:11,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:28:11,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:28:11,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:28:11,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:28:11,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:28:10" (1/3) ... [2020-10-23 20:28:11,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f215a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:28:11, skipping insertion in model container [2020-10-23 20:28:11,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:10" (2/3) ... [2020-10-23 20:28:11,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f215a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:28:11, skipping insertion in model container [2020-10-23 20:28:11,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:28:11" (3/3) ... [2020-10-23 20:28:11,180 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_10x0-2.c [2020-10-23 20:28:11,209 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:28:11,224 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:28:11,260 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:28:11,319 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:28:11,319 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:28:11,320 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:28:11,320 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:28:11,322 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:28:11,322 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:28:11,322 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:28:11,323 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:28:11,348 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-23 20:28:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 20:28:11,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:11,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:11,362 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:11,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:11,382 INFO L82 PathProgramCache]: Analyzing trace with hash -342472451, now seen corresponding path program 1 times [2020-10-23 20:28:11,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:11,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399656230] [2020-10-23 20:28:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:11,488 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:28:11,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399656230] [2020-10-23 20:28:11,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:11,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:28:11,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220124166] [2020-10-23 20:28:11,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:28:11,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:11,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:28:11,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:28:11,962 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2020-10-23 20:28:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:12,283 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-23 20:28:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:28:12,285 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-23 20:28:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:12,296 INFO L225 Difference]: With dead ends: 52 [2020-10-23 20:28:12,297 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 20:28:12,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:28:12,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 20:28:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-23 20:28:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 20:28:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-23 20:28:12,362 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-10-23 20:28:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:12,363 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-23 20:28:12,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:28:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-23 20:28:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 20:28:12,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:12,366 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:12,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:28:12,367 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:12,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash 653425116, now seen corresponding path program 1 times [2020-10-23 20:28:12,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:12,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403011633] [2020-10-23 20:28:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:12,373 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:12,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:12,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:12,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-23 20:28:12,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403011633] [2020-10-23 20:28:12,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:12,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:28:12,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307137024] [2020-10-23 20:28:12,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:28:12,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:12,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:28:12,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:28:12,550 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 7 states. [2020-10-23 20:28:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:12,849 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-23 20:28:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:28:12,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-23 20:28:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:12,853 INFO L225 Difference]: With dead ends: 46 [2020-10-23 20:28:12,853 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 20:28:12,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:28:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 20:28:12,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-23 20:28:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 20:28:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-23 20:28:12,899 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-23 20:28:12,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:12,900 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-23 20:28:12,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:28:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-23 20:28:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 20:28:12,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:12,903 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1, 1, 1, 1] [2020-10-23 20:28:12,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:28:12,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:12,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1221623283, now seen corresponding path program 2 times [2020-10-23 20:28:12,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:12,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352801022] [2020-10-23 20:28:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:12,910 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-23 20:28:13,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352801022] [2020-10-23 20:28:13,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:13,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:28:13,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43753175] [2020-10-23 20:28:13,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:28:13,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:13,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:28:13,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:28:13,180 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 8 states. [2020-10-23 20:28:13,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:13,481 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-10-23 20:28:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:28:13,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-23 20:28:13,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:13,484 INFO L225 Difference]: With dead ends: 51 [2020-10-23 20:28:13,484 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 20:28:13,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-23 20:28:13,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 20:28:13,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 20:28:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 20:28:13,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-23 20:28:13,501 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 45 [2020-10-23 20:28:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:13,502 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-23 20:28:13,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:28:13,502 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-23 20:28:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-23 20:28:13,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:13,504 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:13,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:28:13,505 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:13,505 INFO L82 PathProgramCache]: Analyzing trace with hash 942298982, now seen corresponding path program 3 times [2020-10-23 20:28:13,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:13,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334463404] [2020-10-23 20:28:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:13,509 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 20:28:13,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334463404] [2020-10-23 20:28:13,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:13,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:28:13,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703688347] [2020-10-23 20:28:13,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:28:13,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:13,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:28:13,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:28:13,745 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 9 states. [2020-10-23 20:28:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:14,129 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-10-23 20:28:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 20:28:14,130 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-23 20:28:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:14,132 INFO L225 Difference]: With dead ends: 56 [2020-10-23 20:28:14,132 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 20:28:14,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:28:14,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 20:28:14,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-23 20:28:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 20:28:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-23 20:28:14,149 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 54 [2020-10-23 20:28:14,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:14,149 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-23 20:28:14,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:28:14,149 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-23 20:28:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 20:28:14,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:14,152 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:14,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:28:14,152 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:14,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1161295337, now seen corresponding path program 4 times [2020-10-23 20:28:14,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:14,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389714637] [2020-10-23 20:28:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:14,157 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-23 20:28:14,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389714637] [2020-10-23 20:28:14,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:14,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:28:14,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928374598] [2020-10-23 20:28:14,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:28:14,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:14,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:28:14,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:28:14,407 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 10 states. [2020-10-23 20:28:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:14,866 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-23 20:28:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:28:14,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-23 20:28:14,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:14,869 INFO L225 Difference]: With dead ends: 61 [2020-10-23 20:28:14,870 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 20:28:14,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:28:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 20:28:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-23 20:28:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 20:28:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-23 20:28:14,898 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 63 [2020-10-23 20:28:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:14,901 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-23 20:28:14,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:28:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-23 20:28:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-23 20:28:14,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:14,907 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:14,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:28:14,908 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:14,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2109333008, now seen corresponding path program 5 times [2020-10-23 20:28:14,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:14,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982618734] [2020-10-23 20:28:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:14,920 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-23 20:28:15,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982618734] [2020-10-23 20:28:15,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:15,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 20:28:15,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207395981] [2020-10-23 20:28:15,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 20:28:15,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:15,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 20:28:15,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:28:15,342 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 11 states. [2020-10-23 20:28:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:15,865 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-10-23 20:28:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:28:15,867 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-23 20:28:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:15,869 INFO L225 Difference]: With dead ends: 66 [2020-10-23 20:28:15,869 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 20:28:15,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-10-23 20:28:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 20:28:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 20:28:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 20:28:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 20:28:15,899 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 72 [2020-10-23 20:28:15,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:15,899 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 20:28:15,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 20:28:15,899 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 20:28:15,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 20:28:15,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:15,904 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:15,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:28:15,905 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:15,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:15,906 INFO L82 PathProgramCache]: Analyzing trace with hash 639783135, now seen corresponding path program 6 times [2020-10-23 20:28:15,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:15,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512330823] [2020-10-23 20:28:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:15,911 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-23 20:28:16,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512330823] [2020-10-23 20:28:16,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:16,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:28:16,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878117041] [2020-10-23 20:28:16,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:28:16,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:16,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:28:16,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:28:16,264 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 12 states. [2020-10-23 20:28:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:16,856 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-10-23 20:28:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 20:28:16,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-23 20:28:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:16,858 INFO L225 Difference]: With dead ends: 71 [2020-10-23 20:28:16,858 INFO L226 Difference]: Without dead ends: 64 [2020-10-23 20:28:16,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2020-10-23 20:28:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-23 20:28:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-23 20:28:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-23 20:28:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-23 20:28:16,876 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 81 [2020-10-23 20:28:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:16,877 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-23 20:28:16,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:28:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-23 20:28:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-23 20:28:16,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:16,879 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:16,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:28:16,879 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:16,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:16,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1631598970, now seen corresponding path program 7 times [2020-10-23 20:28:16,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:16,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628037434] [2020-10-23 20:28:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:16,886 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-23 20:28:17,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628037434] [2020-10-23 20:28:17,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:17,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-23 20:28:17,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674468207] [2020-10-23 20:28:17,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 20:28:17,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:17,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 20:28:17,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-23 20:28:17,230 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 13 states. [2020-10-23 20:28:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:17,842 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-23 20:28:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:28:17,843 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-10-23 20:28:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:17,847 INFO L225 Difference]: With dead ends: 76 [2020-10-23 20:28:17,847 INFO L226 Difference]: Without dead ends: 69 [2020-10-23 20:28:17,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2020-10-23 20:28:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-23 20:28:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-23 20:28:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-23 20:28:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-23 20:28:17,877 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 90 [2020-10-23 20:28:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:17,878 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-23 20:28:17,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 20:28:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-23 20:28:17,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-23 20:28:17,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:17,889 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:17,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:28:17,889 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:17,890 INFO L82 PathProgramCache]: Analyzing trace with hash -440062251, now seen corresponding path program 8 times [2020-10-23 20:28:17,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:17,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808921691] [2020-10-23 20:28:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:17,898 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-23 20:28:18,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808921691] [2020-10-23 20:28:18,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:18,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 20:28:18,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564557190] [2020-10-23 20:28:18,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 20:28:18,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 20:28:18,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:28:18,355 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 14 states. [2020-10-23 20:28:18,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:18,968 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2020-10-23 20:28:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 20:28:18,969 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2020-10-23 20:28:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:18,971 INFO L225 Difference]: With dead ends: 81 [2020-10-23 20:28:18,971 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 20:28:18,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-23 20:28:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 20:28:18,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-23 20:28:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 20:28:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-23 20:28:18,988 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 99 [2020-10-23 20:28:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:18,989 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-23 20:28:18,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 20:28:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-23 20:28:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-23 20:28:18,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:18,990 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:18,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:28:18,991 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:18,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:18,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1832058372, now seen corresponding path program 9 times [2020-10-23 20:28:18,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:18,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590135073] [2020-10-23 20:28:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:18,998 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-23 20:28:19,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590135073] [2020-10-23 20:28:19,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:19,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 20:28:19,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958592502] [2020-10-23 20:28:19,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 20:28:19,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:19,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 20:28:19,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:28:19,443 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 15 states. [2020-10-23 20:28:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:20,131 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-10-23 20:28:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 20:28:20,131 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 108 [2020-10-23 20:28:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:20,133 INFO L225 Difference]: With dead ends: 86 [2020-10-23 20:28:20,133 INFO L226 Difference]: Without dead ends: 79 [2020-10-23 20:28:20,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2020-10-23 20:28:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-23 20:28:20,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-23 20:28:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-23 20:28:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-23 20:28:20,165 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 108 [2020-10-23 20:28:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:20,165 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-23 20:28:20,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 20:28:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-23 20:28:20,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-23 20:28:20,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:20,170 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:20,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 20:28:20,170 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:20,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:20,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1858719797, now seen corresponding path program 10 times [2020-10-23 20:28:20,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:20,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276721673] [2020-10-23 20:28:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:20,180 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:28:20,224 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:28:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:28:20,248 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:28:20,301 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:28:20,302 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:28:20,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 20:28:20,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:28:20 BoogieIcfgContainer [2020-10-23 20:28:20,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:28:20,338 INFO L168 Benchmark]: Toolchain (without parser) took 9886.34 ms. Allocated memory was 156.2 MB in the beginning and 270.5 MB in the end (delta: 114.3 MB). Free memory was 115.5 MB in the beginning and 240.9 MB in the end (delta: -125.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:28:20,338 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 156.2 MB. Free memory was 131.5 MB in the beginning and 131.4 MB in the end (delta: 107.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:28:20,340 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.00 ms. Allocated memory is still 156.2 MB. Free memory was 114.8 MB in the beginning and 105.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:20,344 INFO L168 Benchmark]: Boogie Preprocessor took 33.87 ms. Allocated memory is still 156.2 MB. Free memory was 105.7 MB in the beginning and 104.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:20,344 INFO L168 Benchmark]: RCFGBuilder took 442.13 ms. Allocated memory is still 156.2 MB. Free memory was 104.5 MB in the beginning and 128.5 MB in the end (delta: -24.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:20,348 INFO L168 Benchmark]: TraceAbstraction took 9164.08 ms. Allocated memory was 156.2 MB in the beginning and 270.5 MB in the end (delta: 114.3 MB). Free memory was 128.0 MB in the beginning and 240.9 MB in the end (delta: -112.8 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:20,358 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 156.2 MB. Free memory was 131.5 MB in the beginning and 131.4 MB in the end (delta: 107.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 229.00 ms. Allocated memory is still 156.2 MB. Free memory was 114.8 MB in the beginning and 105.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.87 ms. Allocated memory is still 156.2 MB. Free memory was 105.7 MB in the beginning and 104.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 442.13 ms. Allocated memory is still 156.2 MB. Free memory was 104.5 MB in the beginning and 128.5 MB in the end (delta: -24.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9164.08 ms. Allocated memory was 156.2 MB in the beginning and 270.5 MB in the end (delta: 114.3 MB). Free memory was 128.0 MB in the beginning and 240.9 MB in the end (delta: -112.8 MB). Peak memory consumption was 2.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int a = 10; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND TRUE n <= 0 [L7] return m + n; [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] CALL reach_error() [L3] __assert_fail("0", "sum_10x0-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.9s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 273 SDtfs, 664 SDslu, 580 SDs, 0 SdLazy, 904 SolverSat, 209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...