/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/id_i10_o10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:27:11,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:27:11,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:27:11,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:27:11,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:27:11,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:27:11,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:27:11,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:27:11,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:27:11,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:27:11,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:27:11,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:27:11,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:27:11,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:27:11,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:27:11,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:27:11,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:27:11,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:27:11,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:27:11,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:27:11,300 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 20:27:11,324 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:27:11,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:27:11,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:27:11,327 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:27:11,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:27:11,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:27:11,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:27:11,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:27:11,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:27:11,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:27:11,333 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:27:11,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:27:11,333 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:27:11,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:27:11,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:27:11,335 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:27:11,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:27:11,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:27:11,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:27:11,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:27:11,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:27:11,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:27:11,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:27:11,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:27:11,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:27:11,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:27:11,806 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:27:11,807 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:27:11,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-10-23 20:27:11,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a90da89bf/09504630b72243b181bd10502dcabe31/FLAG189437cc3 [2020-10-23 20:27:12,537 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:27:12,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-10-23 20:27:12,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a90da89bf/09504630b72243b181bd10502dcabe31/FLAG189437cc3 [2020-10-23 20:27:12,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a90da89bf/09504630b72243b181bd10502dcabe31 [2020-10-23 20:27:12,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:27:12,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:27:12,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:27:12,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:27:12,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:27:12,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:27:12" (1/1) ... [2020-10-23 20:27:12,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b45425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:12, skipping insertion in model container [2020-10-23 20:27:12,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:27:12" (1/1) ... [2020-10-23 20:27:12,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:27:12,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:27:13,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:27:13,172 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:27:13,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:27:13,213 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:27:13,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:13 WrapperNode [2020-10-23 20:27:13,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:27:13,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:27:13,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:27:13,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:27:13,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:13" (1/1) ... [2020-10-23 20:27:13,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:13" (1/1) ... [2020-10-23 20:27:13,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:13" (1/1) ... [2020-10-23 20:27:13,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:13" (1/1) ... [2020-10-23 20:27:13,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:13" (1/1) ... [2020-10-23 20:27:13,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:13" (1/1) ... [2020-10-23 20:27:13,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:13" (1/1) ... [2020-10-23 20:27:13,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:27:13,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:27:13,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:27:13,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:27:13,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:13" (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 20:27:13,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:27:13,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:27:13,345 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:27:13,345 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 20:27:13,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:27:13,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:27:13,346 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:27:13,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:27:13,346 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:27:13,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:27:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 20:27:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:27:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:27:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:27:13,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:27:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:27:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:27:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:27:13,620 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:27:13,620 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:27:13,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:27:13 BoogieIcfgContainer [2020-10-23 20:27:13,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:27:13,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:27:13,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:27:13,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:27:13,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:27:12" (1/3) ... [2020-10-23 20:27:13,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fcdc01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:27:13, skipping insertion in model container [2020-10-23 20:27:13,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:13" (2/3) ... [2020-10-23 20:27:13,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fcdc01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:27:13, skipping insertion in model container [2020-10-23 20:27:13,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:27:13" (3/3) ... [2020-10-23 20:27:13,654 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-10-23 20:27:13,678 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:27:13,694 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:27:13,711 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:27:13,755 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:27:13,757 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:27:13,758 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:27:13,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:27:13,758 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:27:13,758 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:27:13,758 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:27:13,758 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:27:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-23 20:27:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 20:27:13,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:13,802 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] [2020-10-23 20:27:13,804 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:13,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash -742560695, now seen corresponding path program 1 times [2020-10-23 20:27:13,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:13,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656539418] [2020-10-23 20:27:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:13,945 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:14,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:14,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:14,255 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 20:27:14,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656539418] [2020-10-23 20:27:14,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:14,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:27:14,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508753334] [2020-10-23 20:27:14,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:27:14,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:14,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:27:14,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:27:14,292 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 6 states. [2020-10-23 20:27:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:14,654 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-23 20:27:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:14,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-23 20:27:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:14,668 INFO L225 Difference]: With dead ends: 52 [2020-10-23 20:27:14,668 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 20:27:14,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 20:27:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 20:27:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 20:27:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 20:27:14,736 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-10-23 20:27:14,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:14,737 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 20:27:14,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:27:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 20:27:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 20:27:14,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:14,743 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:27:14,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:27:14,744 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1024612499, now seen corresponding path program 1 times [2020-10-23 20:27:14,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:14,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838314152] [2020-10-23 20:27:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:14,750 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:14,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:14,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:14,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:27:14,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838314152] [2020-10-23 20:27:14,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:14,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:27:14,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402188531] [2020-10-23 20:27:15,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:27:15,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:15,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:27:15,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:27:15,004 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 7 states. [2020-10-23 20:27:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:15,299 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-10-23 20:27:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:15,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-23 20:27:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:15,302 INFO L225 Difference]: With dead ends: 44 [2020-10-23 20:27:15,302 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 20:27:15,304 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 20:27:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 20:27:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-23 20:27:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 20:27:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-23 20:27:15,318 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2020-10-23 20:27:15,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:15,319 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-23 20:27:15,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:27:15,319 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-23 20:27:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 20:27:15,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:15,321 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:27:15,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:27:15,322 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:15,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:15,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1157111945, now seen corresponding path program 2 times [2020-10-23 20:27:15,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:15,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770110609] [2020-10-23 20:27:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:15,326 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:15,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:15,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:15,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:15,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 20:27:15,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770110609] [2020-10-23 20:27:15,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:15,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:27:15,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457524345] [2020-10-23 20:27:15,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:27:15,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:15,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:27:15,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:27:15,509 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 8 states. [2020-10-23 20:27:15,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:15,808 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 20:27:15,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:27:15,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-23 20:27:15,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:15,810 INFO L225 Difference]: With dead ends: 49 [2020-10-23 20:27:15,811 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 20:27:15,812 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 20:27:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 20:27:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-23 20:27:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 20:27:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-23 20:27:15,825 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 41 [2020-10-23 20:27:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:15,826 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-23 20:27:15,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:27:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-23 20:27:15,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-23 20:27:15,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:15,828 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:27:15,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:27:15,829 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:15,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:15,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2083092563, now seen corresponding path program 3 times [2020-10-23 20:27:15,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:15,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789106370] [2020-10-23 20:27:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:15,833 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:15,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:15,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:15,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:15,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:15,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 20:27:16,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789106370] [2020-10-23 20:27:16,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:16,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:27:16,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771142298] [2020-10-23 20:27:16,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:27:16,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:16,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:27:16,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:27:16,011 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 9 states. [2020-10-23 20:27:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:16,315 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-10-23 20:27:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 20:27:16,316 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-23 20:27:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:16,318 INFO L225 Difference]: With dead ends: 54 [2020-10-23 20:27:16,318 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 20:27:16,319 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 20:27:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 20:27:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 20:27:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 20:27:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 20:27:16,332 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 49 [2020-10-23 20:27:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:16,333 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 20:27:16,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:27:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 20:27:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 20:27:16,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:16,335 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:27:16,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:27:16,336 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:16,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2025718985, now seen corresponding path program 4 times [2020-10-23 20:27:16,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:16,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118156834] [2020-10-23 20:27:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:16,340 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:16,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:16,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:16,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:16,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:16,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:16,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 20:27:16,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118156834] [2020-10-23 20:27:16,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:16,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:27:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562653833] [2020-10-23 20:27:16,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:27:16,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:27:16,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:16,592 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 10 states. [2020-10-23 20:27:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:17,006 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-10-23 20:27:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:27:17,008 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-23 20:27:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:17,010 INFO L225 Difference]: With dead ends: 59 [2020-10-23 20:27:17,010 INFO L226 Difference]: Without dead ends: 52 [2020-10-23 20:27:17,011 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 20:27:17,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-23 20:27:17,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-23 20:27:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-23 20:27:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-23 20:27:17,025 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 57 [2020-10-23 20:27:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:17,025 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-23 20:27:17,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:27:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-23 20:27:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-23 20:27:17,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:17,027 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:27:17,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:27:17,027 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:17,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2086365203, now seen corresponding path program 5 times [2020-10-23 20:27:17,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:17,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312229845] [2020-10-23 20:27:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:17,032 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 20:27:17,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312229845] [2020-10-23 20:27:17,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:17,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 20:27:17,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707214629] [2020-10-23 20:27:17,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 20:27:17,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:17,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 20:27:17,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:27:17,246 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 11 states. [2020-10-23 20:27:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:17,736 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-23 20:27:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:27:17,736 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-23 20:27:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:17,738 INFO L225 Difference]: With dead ends: 64 [2020-10-23 20:27:17,738 INFO L226 Difference]: Without dead ends: 57 [2020-10-23 20:27:17,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-10-23 20:27:17,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-23 20:27:17,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-23 20:27:17,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 20:27:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-23 20:27:17,754 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 65 [2020-10-23 20:27:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:17,754 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-23 20:27:17,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 20:27:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-23 20:27:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-23 20:27:17,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:17,756 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:27:17,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:27:17,756 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:17,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1881990903, now seen corresponding path program 6 times [2020-10-23 20:27:17,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:17,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285267644] [2020-10-23 20:27:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:17,761 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:17,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 20:27:18,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285267644] [2020-10-23 20:27:18,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:18,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:27:18,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190803384] [2020-10-23 20:27:18,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:27:18,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:18,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:27:18,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:27:18,048 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 12 states. [2020-10-23 20:27:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:18,622 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2020-10-23 20:27:18,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 20:27:18,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-10-23 20:27:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:18,625 INFO L225 Difference]: With dead ends: 69 [2020-10-23 20:27:18,625 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 20:27:18,626 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 20:27:18,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 20:27:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-23 20:27:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 20:27:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-23 20:27:18,641 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 73 [2020-10-23 20:27:18,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:18,642 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-23 20:27:18,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:27:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-23 20:27:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 20:27:18,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:18,643 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:27:18,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:27:18,644 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1486608429, now seen corresponding path program 7 times [2020-10-23 20:27:18,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:18,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246445867] [2020-10-23 20:27:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:18,649 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:18,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:18,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:18,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:18,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:18,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:18,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:18,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:18,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:18,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 20:27:18,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246445867] [2020-10-23 20:27:18,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:18,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-23 20:27:18,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645672393] [2020-10-23 20:27:18,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 20:27:18,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 20:27:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-23 20:27:18,944 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 13 states. [2020-10-23 20:27:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:19,569 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-10-23 20:27:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:27:19,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 81 [2020-10-23 20:27:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:19,575 INFO L225 Difference]: With dead ends: 74 [2020-10-23 20:27:19,575 INFO L226 Difference]: Without dead ends: 67 [2020-10-23 20:27:19,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2020-10-23 20:27:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-23 20:27:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-23 20:27:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-23 20:27:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-23 20:27:19,611 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 81 [2020-10-23 20:27:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:19,611 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-23 20:27:19,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 20:27:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-23 20:27:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-23 20:27:19,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:19,617 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:27:19,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:27:19,617 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:19,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:19,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2047124151, now seen corresponding path program 8 times [2020-10-23 20:27:19,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:19,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146811142] [2020-10-23 20:27:19,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:19,625 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 20:27:20,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146811142] [2020-10-23 20:27:20,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:20,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 20:27:20,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425552903] [2020-10-23 20:27:20,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 20:27:20,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:20,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 20:27:20,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:27:20,023 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 14 states. [2020-10-23 20:27:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:20,685 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-10-23 20:27:20,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 20:27:20,686 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-10-23 20:27:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:20,687 INFO L225 Difference]: With dead ends: 79 [2020-10-23 20:27:20,687 INFO L226 Difference]: Without dead ends: 72 [2020-10-23 20:27:20,688 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 20:27:20,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-23 20:27:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-23 20:27:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-23 20:27:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-23 20:27:20,706 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 89 [2020-10-23 20:27:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:20,706 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-23 20:27:20,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 20:27:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-23 20:27:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-23 20:27:20,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:20,708 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:27:20,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:27:20,708 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:20,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1811920787, now seen corresponding path program 9 times [2020-10-23 20:27:20,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:20,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746753317] [2020-10-23 20:27:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:20,715 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:21,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:21,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 20:27:21,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746753317] [2020-10-23 20:27:21,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:21,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 20:27:21,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710171500] [2020-10-23 20:27:21,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 20:27:21,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:21,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 20:27:21,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:27:21,109 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 15 states. [2020-10-23 20:27:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:21,806 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-10-23 20:27:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 20:27:21,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 97 [2020-10-23 20:27:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:21,809 INFO L225 Difference]: With dead ends: 84 [2020-10-23 20:27:21,809 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 20:27:21,810 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 20:27:21,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 20:27:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-23 20:27:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-23 20:27:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-23 20:27:21,830 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 97 [2020-10-23 20:27:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:21,831 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-23 20:27:21,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 20:27:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-23 20:27:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-23 20:27:21,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:21,832 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:27:21,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 20:27:21,832 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:21,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1912263049, now seen corresponding path program 10 times [2020-10-23 20:27:21,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:21,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848435868] [2020-10-23 20:27:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:21,839 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:27:21,859 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:27:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:27:21,881 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:27:21,920 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:27:21,920 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:27:21,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 20:27:21,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:27:21 BoogieIcfgContainer [2020-10-23 20:27:21,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:27:21,946 INFO L168 Benchmark]: Toolchain (without parser) took 9023.05 ms. Allocated memory was 160.4 MB in the beginning and 278.9 MB in the end (delta: 118.5 MB). Free memory was 136.5 MB in the beginning and 154.7 MB in the end (delta: -18.2 MB). Peak memory consumption was 101.2 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:21,946 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 160.4 MB. Free memory is still 134.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:27:21,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.68 ms. Allocated memory is still 160.4 MB. Free memory was 135.9 MB in the beginning and 126.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:21,948 INFO L168 Benchmark]: Boogie Preprocessor took 44.79 ms. Allocated memory is still 160.4 MB. Free memory was 126.9 MB in the beginning and 125.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:21,949 INFO L168 Benchmark]: RCFGBuilder took 361.07 ms. Allocated memory is still 160.4 MB. Free memory was 125.6 MB in the beginning and 112.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:21,950 INFO L168 Benchmark]: TraceAbstraction took 8306.17 ms. Allocated memory was 160.4 MB in the beginning and 278.9 MB in the end (delta: 118.5 MB). Free memory was 112.4 MB in the beginning and 154.7 MB in the end (delta: -42.3 MB). Peak memory consumption was 77.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:21,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 160.4 MB. Free memory is still 134.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 285.68 ms. Allocated memory is still 160.4 MB. Free memory was 135.9 MB in the beginning and 126.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.79 ms. Allocated memory is still 160.4 MB. Free memory was 126.9 MB in the beginning and 125.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 361.07 ms. Allocated memory is still 160.4 MB. Free memory was 125.6 MB in the beginning and 112.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8306.17 ms. Allocated memory was 160.4 MB in the beginning and 278.9 MB in the end (delta: 118.5 MB). Free memory was 112.4 MB in the beginning and 154.7 MB in the end (delta: -42.3 MB). Peak memory consumption was 77.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = 10; [L13] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 10 [L15] CALL reach_error() [L4] __assert_fail("0", "id_i10_o10-1.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.1s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 273 SDtfs, 640 SDslu, 572 SDs, 0 SdLazy, 824 SolverSat, 205 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 292 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...