/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_15x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:28:23,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:28:23,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:28:23,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:28:23,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:28:23,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:28:23,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:28:23,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:28:23,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:28:23,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:28:23,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:28:23,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:28:23,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:28:23,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:28:23,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:28:23,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:28:23,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:28:23,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:28:23,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:28:23,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:28:23,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:28:23,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:28:23,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:28:23,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:28:23,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:28:23,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:28:23,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:28:23,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:28:23,403 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 20:28:23,416 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:28:23,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:28:23,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:28:23,418 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:28:23,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:28:23,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:28:23,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:28:23,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:28:23,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:28:23,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:28:23,420 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:28:23,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:28:23,421 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:28:23,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:28:23,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:28:23,421 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:28:23,422 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:28:23,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:28:23,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:28:23,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:28:23,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:28:23,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:28:23,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:28:23,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:28:23,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:28:23,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:28:23,850 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:28:23,851 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:28:23,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-10-23 20:28:23,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64b81639f/cfb094ded0e94340a863366f13e09f7b/FLAG8207f03c8 [2020-10-23 20:28:24,609 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:28:24,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-10-23 20:28:24,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64b81639f/cfb094ded0e94340a863366f13e09f7b/FLAG8207f03c8 [2020-10-23 20:28:24,985 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64b81639f/cfb094ded0e94340a863366f13e09f7b [2020-10-23 20:28:24,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:28:24,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:28:24,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:28:24,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:28:25,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:28:25,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:28:24" (1/1) ... [2020-10-23 20:28:25,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73bf27c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:25, skipping insertion in model container [2020-10-23 20:28:25,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:28:24" (1/1) ... [2020-10-23 20:28:25,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:28:25,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:28:25,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:28:25,197 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:28:25,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:28:25,228 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:28:25,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:25 WrapperNode [2020-10-23 20:28:25,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:28:25,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:28:25,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:28:25,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:28:25,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:25" (1/1) ... [2020-10-23 20:28:25,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:25" (1/1) ... [2020-10-23 20:28:25,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:25" (1/1) ... [2020-10-23 20:28:25,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:25" (1/1) ... [2020-10-23 20:28:25,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:25" (1/1) ... [2020-10-23 20:28:25,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:25" (1/1) ... [2020-10-23 20:28:25,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:25" (1/1) ... [2020-10-23 20:28:25,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:28:25,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:28:25,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:28:25,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:28:25,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:25" (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 20:28:25,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:28:25,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:28:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:28:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-23 20:28:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:28:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:28:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:28:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:28:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:28:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-23 20:28:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:28:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:28:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:28:25,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:28:25,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:28:25,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:28:25,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:28:25,860 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:28:25,860 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:28:25,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:28:25 BoogieIcfgContainer [2020-10-23 20:28:25,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:28:25,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:28:25,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:28:25,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:28:25,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:28:24" (1/3) ... [2020-10-23 20:28:25,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a90994b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:28:25, skipping insertion in model container [2020-10-23 20:28:25,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:28:25" (2/3) ... [2020-10-23 20:28:25,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a90994b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:28:25, skipping insertion in model container [2020-10-23 20:28:25,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:28:25" (3/3) ... [2020-10-23 20:28:25,883 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2020-10-23 20:28:25,897 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:28:25,903 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:28:25,919 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:28:25,959 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:28:25,959 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:28:25,961 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:28:25,961 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:28:25,961 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:28:25,961 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:28:25,962 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:28:25,962 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:28:26,007 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-23 20:28:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 20:28:26,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:26,018 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 20:28:26,019 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:26,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash -342472451, now seen corresponding path program 1 times [2020-10-23 20:28:26,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:26,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44030370] [2020-10-23 20:28:26,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:26,134 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:26,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:26,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:26,586 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 20:28:26,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44030370] [2020-10-23 20:28:26,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:26,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:28:26,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217322908] [2020-10-23 20:28:26,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:28:26,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:26,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:28:26,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:28:26,628 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2020-10-23 20:28:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:27,014 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-23 20:28:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:28:27,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-23 20:28:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:27,037 INFO L225 Difference]: With dead ends: 52 [2020-10-23 20:28:27,038 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 20:28:27,046 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 20:28:27,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 20:28:27,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-23 20:28:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 20:28:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-23 20:28:27,132 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-10-23 20:28:27,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:27,134 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-23 20:28:27,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:28:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-23 20:28:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 20:28:27,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:27,139 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 20:28:27,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:28:27,140 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:27,151 INFO L82 PathProgramCache]: Analyzing trace with hash 653425116, now seen corresponding path program 1 times [2020-10-23 20:28:27,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:27,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557449675] [2020-10-23 20:28:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:27,163 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,385 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 20:28:27,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557449675] [2020-10-23 20:28:27,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:27,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:28:27,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342039916] [2020-10-23 20:28:27,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:28:27,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:28:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:28:27,389 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 7 states. [2020-10-23 20:28:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:27,657 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-23 20:28:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:28:27,658 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-23 20:28:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:27,660 INFO L225 Difference]: With dead ends: 46 [2020-10-23 20:28:27,660 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 20:28:27,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:28:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 20:28:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-23 20:28:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 20:28:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-23 20:28:27,676 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-23 20:28:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:27,677 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-23 20:28:27,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:28:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-23 20:28:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 20:28:27,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:27,681 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 20:28:27,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:28:27,681 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:27,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1221623283, now seen corresponding path program 2 times [2020-10-23 20:28:27,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:27,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99496846] [2020-10-23 20:28:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:27,686 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,933 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 20:28:27,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99496846] [2020-10-23 20:28:27,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:27,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:28:27,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814447602] [2020-10-23 20:28:27,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:28:27,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:27,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:28:27,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:28:27,937 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 8 states. [2020-10-23 20:28:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:28,228 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-10-23 20:28:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:28:28,229 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-23 20:28:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:28,231 INFO L225 Difference]: With dead ends: 51 [2020-10-23 20:28:28,231 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 20:28:28,232 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 20:28:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 20:28:28,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 20:28:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 20:28:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-23 20:28:28,245 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 45 [2020-10-23 20:28:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:28,246 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-23 20:28:28,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:28:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-23 20:28:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-23 20:28:28,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:28,248 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 20:28:28,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:28:28,249 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:28,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:28,249 INFO L82 PathProgramCache]: Analyzing trace with hash 942298982, now seen corresponding path program 3 times [2020-10-23 20:28:28,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:28,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87127525] [2020-10-23 20:28:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:28,253 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,432 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 20:28:28,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87127525] [2020-10-23 20:28:28,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:28,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:28:28,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212359156] [2020-10-23 20:28:28,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:28:28,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:28,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:28:28,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:28:28,435 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 9 states. [2020-10-23 20:28:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:28,767 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-10-23 20:28:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 20:28:28,767 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-23 20:28:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:28,769 INFO L225 Difference]: With dead ends: 56 [2020-10-23 20:28:28,769 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 20:28:28,770 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 20:28:28,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 20:28:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-23 20:28:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 20:28:28,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-23 20:28:28,783 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 54 [2020-10-23 20:28:28,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:28,784 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-23 20:28:28,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:28:28,784 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-23 20:28:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 20:28:28,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:28,786 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 20:28:28,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:28:28,786 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:28,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1161295337, now seen corresponding path program 4 times [2020-10-23 20:28:28,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:28,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511940116] [2020-10-23 20:28:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:28,791 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,997 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 20:28:28,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511940116] [2020-10-23 20:28:28,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:28,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:28:28,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106172306] [2020-10-23 20:28:28,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:28:28,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:29,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:28:29,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:28:29,000 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 10 states. [2020-10-23 20:28:29,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:29,446 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-23 20:28:29,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:28:29,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-23 20:28:29,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:29,449 INFO L225 Difference]: With dead ends: 61 [2020-10-23 20:28:29,449 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 20:28:29,450 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 20:28:29,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 20:28:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-23 20:28:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 20:28:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-23 20:28:29,465 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 63 [2020-10-23 20:28:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:29,465 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-23 20:28:29,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:28:29,466 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-23 20:28:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-23 20:28:29,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:29,467 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 20:28:29,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:28:29,468 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:29,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2109333008, now seen corresponding path program 5 times [2020-10-23 20:28:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:29,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748799904] [2020-10-23 20:28:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:29,473 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,800 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 20:28:29,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748799904] [2020-10-23 20:28:29,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:29,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 20:28:29,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49210300] [2020-10-23 20:28:29,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 20:28:29,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:29,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 20:28:29,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:28:29,807 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 11 states. [2020-10-23 20:28:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:30,323 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-10-23 20:28:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:28:30,324 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-23 20:28:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:30,326 INFO L225 Difference]: With dead ends: 66 [2020-10-23 20:28:30,326 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 20:28:30,327 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 20:28:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 20:28:30,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 20:28:30,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 20:28:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 20:28:30,343 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 72 [2020-10-23 20:28:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:30,343 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 20:28:30,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 20:28:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 20:28:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 20:28:30,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:30,345 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 20:28:30,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:28:30,346 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:30,346 INFO L82 PathProgramCache]: Analyzing trace with hash 639783135, now seen corresponding path program 6 times [2020-10-23 20:28:30,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:30,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123051329] [2020-10-23 20:28:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:30,351 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,766 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 20:28:30,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123051329] [2020-10-23 20:28:30,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:30,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:28:30,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457844160] [2020-10-23 20:28:30,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:28:30,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:30,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:28:30,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:28:30,769 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 12 states. [2020-10-23 20:28:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:31,336 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-10-23 20:28:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 20:28:31,336 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-23 20:28:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:31,338 INFO L225 Difference]: With dead ends: 71 [2020-10-23 20:28:31,339 INFO L226 Difference]: Without dead ends: 64 [2020-10-23 20:28:31,340 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 20:28:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-23 20:28:31,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-23 20:28:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-23 20:28:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-23 20:28:31,357 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 81 [2020-10-23 20:28:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:31,358 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-23 20:28:31,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:28:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-23 20:28:31,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-23 20:28:31,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:31,360 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 20:28:31,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:28:31,360 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1631598970, now seen corresponding path program 7 times [2020-10-23 20:28:31,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:31,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021353842] [2020-10-23 20:28:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:31,366 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,692 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 20:28:31,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021353842] [2020-10-23 20:28:31,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:31,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-23 20:28:31,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018143817] [2020-10-23 20:28:31,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 20:28:31,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:31,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 20:28:31,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-23 20:28:31,694 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 13 states. [2020-10-23 20:28:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:32,316 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-23 20:28:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:28:32,317 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-10-23 20:28:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:32,319 INFO L225 Difference]: With dead ends: 76 [2020-10-23 20:28:32,319 INFO L226 Difference]: Without dead ends: 69 [2020-10-23 20:28:32,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2020-10-23 20:28:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-23 20:28:32,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-23 20:28:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-23 20:28:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-23 20:28:32,336 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 90 [2020-10-23 20:28:32,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:32,337 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-23 20:28:32,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 20:28:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-23 20:28:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-23 20:28:32,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:32,342 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 20:28:32,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:28:32,343 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:32,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:32,343 INFO L82 PathProgramCache]: Analyzing trace with hash -440062251, now seen corresponding path program 8 times [2020-10-23 20:28:32,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:32,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119007586] [2020-10-23 20:28:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:32,357 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,794 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 20:28:32,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119007586] [2020-10-23 20:28:32,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:32,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 20:28:32,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956785894] [2020-10-23 20:28:32,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 20:28:32,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 20:28:32,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:28:32,804 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 14 states. [2020-10-23 20:28:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:33,453 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2020-10-23 20:28:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 20:28:33,453 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2020-10-23 20:28:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:33,455 INFO L225 Difference]: With dead ends: 81 [2020-10-23 20:28:33,455 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 20:28:33,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-23 20:28:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 20:28:33,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-23 20:28:33,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 20:28:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-23 20:28:33,488 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 99 [2020-10-23 20:28:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:33,489 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-23 20:28:33,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 20:28:33,490 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-23 20:28:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-23 20:28:33,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:33,494 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 20:28:33,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:28:33,495 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:33,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:33,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1832058372, now seen corresponding path program 9 times [2020-10-23 20:28:33,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:33,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879192859] [2020-10-23 20:28:33,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:33,505 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,955 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 20:28:33,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879192859] [2020-10-23 20:28:33,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:33,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 20:28:33,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378954181] [2020-10-23 20:28:33,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 20:28:33,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:33,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 20:28:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:28:33,958 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 15 states. [2020-10-23 20:28:34,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:34,688 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-10-23 20:28:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 20:28:34,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 108 [2020-10-23 20:28:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:34,690 INFO L225 Difference]: With dead ends: 86 [2020-10-23 20:28:34,690 INFO L226 Difference]: Without dead ends: 79 [2020-10-23 20:28:34,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2020-10-23 20:28:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-23 20:28:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-23 20:28:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-23 20:28:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-23 20:28:34,714 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 108 [2020-10-23 20:28:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:34,714 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-23 20:28:34,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 20:28:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-23 20:28:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-23 20:28:34,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:34,716 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 20:28:34,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 20:28:34,716 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1858719797, now seen corresponding path program 10 times [2020-10-23 20:28:34,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:34,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62324520] [2020-10-23 20:28:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:34,724 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:34,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:34,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:34,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:34,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:34,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:34,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:34,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-23 20:28:35,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62324520] [2020-10-23 20:28:35,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:35,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 20:28:35,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530648207] [2020-10-23 20:28:35,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 20:28:35,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:35,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 20:28:35,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:28:35,220 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 16 states. [2020-10-23 20:28:36,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:36,031 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-10-23 20:28:36,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 20:28:36,032 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 117 [2020-10-23 20:28:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:36,033 INFO L225 Difference]: With dead ends: 91 [2020-10-23 20:28:36,033 INFO L226 Difference]: Without dead ends: 84 [2020-10-23 20:28:36,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2020-10-23 20:28:36,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-23 20:28:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-23 20:28:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-23 20:28:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-10-23 20:28:36,049 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 117 [2020-10-23 20:28:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:36,050 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-10-23 20:28:36,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 20:28:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-10-23 20:28:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-23 20:28:36,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:36,052 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 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 20:28:36,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 20:28:36,052 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:36,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1671901298, now seen corresponding path program 11 times [2020-10-23 20:28:36,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:36,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496489317] [2020-10-23 20:28:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:36,060 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-10-23 20:28:36,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496489317] [2020-10-23 20:28:36,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:36,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 20:28:36,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096494629] [2020-10-23 20:28:36,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 20:28:36,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:36,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 20:28:36,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:28:36,684 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 17 states. [2020-10-23 20:28:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:37,453 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2020-10-23 20:28:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 20:28:37,454 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 126 [2020-10-23 20:28:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:37,455 INFO L225 Difference]: With dead ends: 96 [2020-10-23 20:28:37,456 INFO L226 Difference]: Without dead ends: 89 [2020-10-23 20:28:37,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=309, Invalid=621, Unknown=0, NotChecked=0, Total=930 [2020-10-23 20:28:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-23 20:28:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-23 20:28:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-23 20:28:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-23 20:28:37,474 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 126 [2020-10-23 20:28:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:37,475 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-23 20:28:37,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 20:28:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-23 20:28:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-23 20:28:37,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:37,477 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 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 20:28:37,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 20:28:37,477 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1502940223, now seen corresponding path program 12 times [2020-10-23 20:28:37,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:37,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502588240] [2020-10-23 20:28:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:37,487 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-23 20:28:38,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502588240] [2020-10-23 20:28:38,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:38,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-23 20:28:38,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237936433] [2020-10-23 20:28:38,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 20:28:38,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:38,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 20:28:38,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-23 20:28:38,141 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 18 states. [2020-10-23 20:28:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:39,001 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2020-10-23 20:28:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 20:28:39,008 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 135 [2020-10-23 20:28:39,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:39,010 INFO L225 Difference]: With dead ends: 101 [2020-10-23 20:28:39,010 INFO L226 Difference]: Without dead ends: 94 [2020-10-23 20:28:39,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 20:28:39,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-23 20:28:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-23 20:28:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-23 20:28:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-10-23 20:28:39,034 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 135 [2020-10-23 20:28:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:39,034 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-10-23 20:28:39,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 20:28:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-10-23 20:28:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-23 20:28:39,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:39,037 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 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 20:28:39,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 20:28:39,037 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:39,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:39,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1695288856, now seen corresponding path program 13 times [2020-10-23 20:28:39,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:39,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494779736] [2020-10-23 20:28:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:39,064 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-23 20:28:39,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494779736] [2020-10-23 20:28:39,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:39,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-23 20:28:39,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128200727] [2020-10-23 20:28:39,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 20:28:39,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:39,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 20:28:39,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-23 20:28:39,762 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 19 states. [2020-10-23 20:28:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:40,698 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2020-10-23 20:28:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 20:28:40,698 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 144 [2020-10-23 20:28:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:40,702 INFO L225 Difference]: With dead ends: 106 [2020-10-23 20:28:40,702 INFO L226 Difference]: Without dead ends: 99 [2020-10-23 20:28:40,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 20:28:40,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-23 20:28:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-23 20:28:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-23 20:28:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-23 20:28:40,722 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 144 [2020-10-23 20:28:40,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:40,723 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-23 20:28:40,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 20:28:40,723 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-23 20:28:40,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-23 20:28:40,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:40,725 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 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 20:28:40,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 20:28:40,725 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:40,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:40,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1916345015, now seen corresponding path program 14 times [2020-10-23 20:28:40,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:40,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686175186] [2020-10-23 20:28:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:40,731 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:40,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:40,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:40,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:40,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:40,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:41,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:41,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:41,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:41,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:41,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:41,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:41,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:41,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:41,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:41,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:41,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:28:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-23 20:28:41,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686175186] [2020-10-23 20:28:41,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:41,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-23 20:28:41,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686065604] [2020-10-23 20:28:41,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 20:28:41,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:41,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 20:28:41,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:28:41,564 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 20 states. [2020-10-23 20:28:42,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:42,647 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2020-10-23 20:28:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 20:28:42,649 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 153 [2020-10-23 20:28:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:42,651 INFO L225 Difference]: With dead ends: 111 [2020-10-23 20:28:42,651 INFO L226 Difference]: Without dead ends: 104 [2020-10-23 20:28:42,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 20:28:42,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-23 20:28:42,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-23 20:28:42,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-23 20:28:42,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-10-23 20:28:42,670 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 153 [2020-10-23 20:28:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:42,674 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-10-23 20:28:42,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 20:28:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-10-23 20:28:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-23 20:28:42,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:42,677 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 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 20:28:42,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 20:28:42,678 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:42,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:42,678 INFO L82 PathProgramCache]: Analyzing trace with hash -540599902, now seen corresponding path program 15 times [2020-10-23 20:28:42,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:42,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306378044] [2020-10-23 20:28:42,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:42,683 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:28:42,709 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:28:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:28:42,745 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:28:42,798 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:28:42,798 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:28:42,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 20:28:42,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:28:42 BoogieIcfgContainer [2020-10-23 20:28:42,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:28:42,826 INFO L168 Benchmark]: Toolchain (without parser) took 17834.69 ms. Allocated memory was 165.7 MB in the beginning and 429.9 MB in the end (delta: 264.2 MB). Free memory was 141.8 MB in the beginning and 244.6 MB in the end (delta: -102.8 MB). Peak memory consumption was 162.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:42,826 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 165.7 MB. Free memory is still 138.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:28:42,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.74 ms. Allocated memory is still 165.7 MB. Free memory was 141.2 MB in the beginning and 132.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:42,827 INFO L168 Benchmark]: Boogie Preprocessor took 31.67 ms. Allocated memory is still 165.7 MB. Free memory was 132.2 MB in the beginning and 130.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:42,828 INFO L168 Benchmark]: RCFGBuilder took 600.18 ms. Allocated memory is still 165.7 MB. Free memory was 130.8 MB in the beginning and 117.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:42,829 INFO L168 Benchmark]: TraceAbstraction took 16955.16 ms. Allocated memory was 165.7 MB in the beginning and 429.9 MB in the end (delta: 264.2 MB). Free memory was 116.8 MB in the beginning and 244.6 MB in the end (delta: -127.8 MB). Peak memory consumption was 137.3 MB. Max. memory is 8.0 GB. [2020-10-23 20:28:42,831 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 165.7 MB. Free memory is still 138.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 230.74 ms. Allocated memory is still 165.7 MB. Free memory was 141.2 MB in the beginning and 132.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.67 ms. Allocated memory is still 165.7 MB. Free memory was 132.2 MB in the beginning and 130.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 600.18 ms. Allocated memory is still 165.7 MB. Free memory was 130.8 MB in the beginning and 117.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16955.16 ms. Allocated memory was 165.7 MB in the beginning and 429.9 MB in the end (delta: 264.2 MB). Free memory was 116.8 MB in the beginning and 244.6 MB in the end (delta: -127.8 MB). Peak memory consumption was 137.3 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 = 15; [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 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); [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_15x0-2.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: 16.8s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 408 SDtfs, 1298 SDslu, 899 SDs, 0 SdLazy, 1573 SolverSat, 393 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 585 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 15 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...