/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/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:57:10,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:57:10,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:57:10,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 01:57:10,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:57:10,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:57:10,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:57:10,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:57:10,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:57:10,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:57:10,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:57:10,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:57:10,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:57:10,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:57:10,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:57:10,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:57:10,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:57:10,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:57:10,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:57:10,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:57:10,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:57:10,324 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:57:10,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:57:10,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:57:10,328 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:57:10,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:57:10,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:57:10,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:57:10,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:57:10,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:57:10,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:57:10,330 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:57:10,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:57:10,331 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:57:10,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:57:10,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:57:10,331 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:57:10,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:57:10,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:57:10,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:57:10,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:57:10,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:57:10,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:57:10,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:57:10,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:57:10,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:57:10,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:57:10,790 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:57:10,791 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:57:10,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-11-07 01:57:10,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffeb06c78/78b86b8eddfa4e69a112d45ab0603daa/FLAGba9a656e5 [2020-11-07 01:57:11,483 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:57:11,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c [2020-11-07 01:57:11,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffeb06c78/78b86b8eddfa4e69a112d45ab0603daa/FLAGba9a656e5 [2020-11-07 01:57:11,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffeb06c78/78b86b8eddfa4e69a112d45ab0603daa [2020-11-07 01:57:11,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:57:11,843 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:57:11,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:57:11,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:57:11,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:57:11,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:11" (1/1) ... [2020-11-07 01:57:11,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc01777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:11, skipping insertion in model container [2020-11-07 01:57:11,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:11" (1/1) ... [2020-11-07 01:57:11,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:57:11,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:57:12,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:57:12,147 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:57:12,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:57:12,184 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:57:12,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:12 WrapperNode [2020-11-07 01:57:12,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:57:12,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:57:12,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:57:12,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:57:12,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:12" (1/1) ... [2020-11-07 01:57:12,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:12" (1/1) ... [2020-11-07 01:57:12,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:12" (1/1) ... [2020-11-07 01:57:12,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:12" (1/1) ... [2020-11-07 01:57:12,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:12" (1/1) ... [2020-11-07 01:57:12,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:12" (1/1) ... [2020-11-07 01:57:12,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:12" (1/1) ... [2020-11-07 01:57:12,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:57:12,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:57:12,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:57:12,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:57:12,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:12" (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 [2020-11-07 01:57:12,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:57:12,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:57:12,296 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:57:12,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:57:12,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:57:12,296 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:57:12,297 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:57:12,297 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:57:12,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:57:12,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:57:12,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-07 01:57:12,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 01:57:12,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:57:12,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:57:12,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:57:12,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:57:12,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:57:12,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:57:12,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:57:12,863 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:57:12,864 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 01:57:12,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:12 BoogieIcfgContainer [2020-11-07 01:57:12,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:57:12,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:57:12,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:57:12,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:57:12,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:57:11" (1/3) ... [2020-11-07 01:57:12,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bcc1ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:12, skipping insertion in model container [2020-11-07 01:57:12,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:12" (2/3) ... [2020-11-07 01:57:12,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bcc1ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:12, skipping insertion in model container [2020-11-07 01:57:12,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:12" (3/3) ... [2020-11-07 01:57:12,880 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-11-07 01:57:12,899 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:57:12,903 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:57:12,917 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:57:12,953 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:57:12,953 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:57:12,953 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:57:12,954 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:57:12,954 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:57:12,954 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:57:12,954 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:57:12,954 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:57:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-11-07 01:57:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 01:57:12,990 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:12,991 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:12,991 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1377275012, now seen corresponding path program 1 times [2020-11-07 01:57:13,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:13,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691263015] [2020-11-07 01:57:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:13,103 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:13,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:13,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691263015] [2020-11-07 01:57:13,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:13,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:57:13,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69540418] [2020-11-07 01:57:13,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:57:13,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:13,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:57:13,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:57:13,408 INFO L87 Difference]: Start difference. First operand 75 states. Second operand 3 states. [2020-11-07 01:57:13,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:13,601 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2020-11-07 01:57:13,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:57:13,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-11-07 01:57:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:13,613 INFO L225 Difference]: With dead ends: 131 [2020-11-07 01:57:13,613 INFO L226 Difference]: Without dead ends: 63 [2020-11-07 01:57:13,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:57:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-07 01:57:13,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-07 01:57:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 01:57:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-11-07 01:57:13,716 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 37 [2020-11-07 01:57:13,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:13,717 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-11-07 01:57:13,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:57:13,717 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-11-07 01:57:13,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 01:57:13,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:13,721 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:13,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:57:13,722 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:13,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:13,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1392960477, now seen corresponding path program 1 times [2020-11-07 01:57:13,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:13,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369055320] [2020-11-07 01:57:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:13,733 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:13,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:13,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369055320] [2020-11-07 01:57:13,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:13,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 01:57:13,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927165166] [2020-11-07 01:57:13,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 01:57:13,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:13,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 01:57:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:57:13,898 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 5 states. [2020-11-07 01:57:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:14,176 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-11-07 01:57:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 01:57:14,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-11-07 01:57:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:14,180 INFO L225 Difference]: With dead ends: 114 [2020-11-07 01:57:14,181 INFO L226 Difference]: Without dead ends: 80 [2020-11-07 01:57:14,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:57:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-07 01:57:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-11-07 01:57:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-07 01:57:14,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-11-07 01:57:14,204 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 37 [2020-11-07 01:57:14,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:14,205 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-11-07 01:57:14,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 01:57:14,205 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-11-07 01:57:14,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-07 01:57:14,207 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:14,207 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:14,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:57:14,207 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:14,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1809621749, now seen corresponding path program 1 times [2020-11-07 01:57:14,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:14,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048290520] [2020-11-07 01:57:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:14,283 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:14,285 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:14,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:14,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048290520] [2020-11-07 01:57:14,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:14,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 01:57:14,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906489097] [2020-11-07 01:57:14,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 01:57:14,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:14,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 01:57:14,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:57:14,413 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 5 states. [2020-11-07 01:57:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:14,626 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-11-07 01:57:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 01:57:14,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-11-07 01:57:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:14,628 INFO L225 Difference]: With dead ends: 102 [2020-11-07 01:57:14,629 INFO L226 Difference]: Without dead ends: 81 [2020-11-07 01:57:14,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 01:57:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-07 01:57:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2020-11-07 01:57:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-07 01:57:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-11-07 01:57:14,643 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 44 [2020-11-07 01:57:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:14,644 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-11-07 01:57:14,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 01:57:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-11-07 01:57:14,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 01:57:14,646 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:14,646 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, 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] [2020-11-07 01:57:14,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:57:14,646 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:14,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:14,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1119668411, now seen corresponding path program 1 times [2020-11-07 01:57:14,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:14,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209419839] [2020-11-07 01:57:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:14,691 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:14,696 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:15,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:15,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209419839] [2020-11-07 01:57:15,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:15,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-11-07 01:57:15,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519779492] [2020-11-07 01:57:15,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 01:57:15,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:15,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 01:57:15,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-11-07 01:57:15,447 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 19 states. [2020-11-07 01:57:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:16,902 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2020-11-07 01:57:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 01:57:16,903 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-11-07 01:57:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:16,906 INFO L225 Difference]: With dead ends: 171 [2020-11-07 01:57:16,906 INFO L226 Difference]: Without dead ends: 168 [2020-11-07 01:57:16,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=355, Invalid=1367, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 01:57:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-11-07 01:57:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 96. [2020-11-07 01:57:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-07 01:57:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-11-07 01:57:16,966 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 54 [2020-11-07 01:57:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:16,967 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-11-07 01:57:16,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 01:57:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-11-07 01:57:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-07 01:57:16,974 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:16,974 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:16,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:57:16,974 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:16,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1813373789, now seen corresponding path program 2 times [2020-11-07 01:57:16,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:16,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483410493] [2020-11-07 01:57:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:17,034 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:17,035 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:17,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:17,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483410493] [2020-11-07 01:57:17,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:17,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 01:57:17,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783542432] [2020-11-07 01:57:17,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 01:57:17,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:17,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 01:57:17,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-07 01:57:17,266 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 9 states. [2020-11-07 01:57:17,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:17,698 INFO L93 Difference]: Finished difference Result 178 states and 187 transitions. [2020-11-07 01:57:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 01:57:17,699 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-11-07 01:57:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:17,704 INFO L225 Difference]: With dead ends: 178 [2020-11-07 01:57:17,704 INFO L226 Difference]: Without dead ends: 157 [2020-11-07 01:57:17,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-07 01:57:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-11-07 01:57:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2020-11-07 01:57:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-07 01:57:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-11-07 01:57:17,748 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 61 [2020-11-07 01:57:17,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:17,751 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-11-07 01:57:17,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 01:57:17,751 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-11-07 01:57:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 01:57:17,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:17,760 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:17,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 01:57:17,760 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:17,761 INFO L82 PathProgramCache]: Analyzing trace with hash -945090305, now seen corresponding path program 3 times [2020-11-07 01:57:17,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:17,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40134030] [2020-11-07 01:57:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:17,789 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:17,791 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:17,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:17,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40134030] [2020-11-07 01:57:17,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:17,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 01:57:17,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077876858] [2020-11-07 01:57:17,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 01:57:17,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:17,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 01:57:17,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:57:17,919 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 10 states. [2020-11-07 01:57:18,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:18,303 INFO L93 Difference]: Finished difference Result 172 states and 179 transitions. [2020-11-07 01:57:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 01:57:18,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-11-07 01:57:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:18,307 INFO L225 Difference]: With dead ends: 172 [2020-11-07 01:57:18,308 INFO L226 Difference]: Without dead ends: 141 [2020-11-07 01:57:18,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-11-07 01:57:18,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-07 01:57:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 106. [2020-11-07 01:57:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-07 01:57:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-11-07 01:57:18,347 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 64 [2020-11-07 01:57:18,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:18,347 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-11-07 01:57:18,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 01:57:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-11-07 01:57:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-07 01:57:18,350 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:18,350 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:18,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 01:57:18,351 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:18,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2070432673, now seen corresponding path program 1 times [2020-11-07 01:57:18,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:18,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2284862] [2020-11-07 01:57:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:18,378 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:18,380 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:18,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:18,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-07 01:57:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:18,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2284862] [2020-11-07 01:57:18,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:18,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 01:57:18,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559425493] [2020-11-07 01:57:18,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 01:57:18,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:18,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 01:57:18,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-07 01:57:18,588 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 10 states. [2020-11-07 01:57:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:18,900 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2020-11-07 01:57:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 01:57:18,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-11-07 01:57:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:18,902 INFO L225 Difference]: With dead ends: 150 [2020-11-07 01:57:18,902 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 01:57:18,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-11-07 01:57:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 01:57:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-11-07 01:57:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-07 01:57:18,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-11-07 01:57:18,919 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 70 [2020-11-07 01:57:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:18,919 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-11-07 01:57:18,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 01:57:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-11-07 01:57:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-07 01:57:18,921 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:18,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:18,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 01:57:18,922 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:18,923 INFO L82 PathProgramCache]: Analyzing trace with hash 898072343, now seen corresponding path program 4 times [2020-11-07 01:57:18,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:18,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134340757] [2020-11-07 01:57:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:18,977 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:18,979 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:19,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:19,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134340757] [2020-11-07 01:57:19,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:19,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-11-07 01:57:19,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713604445] [2020-11-07 01:57:19,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 01:57:19,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:19,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 01:57:19,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-11-07 01:57:19,854 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 23 states. [2020-11-07 01:57:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:21,957 INFO L93 Difference]: Finished difference Result 198 states and 207 transitions. [2020-11-07 01:57:21,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-07 01:57:21,958 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 71 [2020-11-07 01:57:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:21,960 INFO L225 Difference]: With dead ends: 198 [2020-11-07 01:57:21,960 INFO L226 Difference]: Without dead ends: 195 [2020-11-07 01:57:21,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=499, Invalid=2693, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 01:57:21,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-11-07 01:57:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 123. [2020-11-07 01:57:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-11-07 01:57:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2020-11-07 01:57:22,007 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 71 [2020-11-07 01:57:22,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:22,013 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2020-11-07 01:57:22,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 01:57:22,013 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2020-11-07 01:57:22,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-07 01:57:22,014 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:22,015 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:22,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 01:57:22,015 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:22,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:22,016 INFO L82 PathProgramCache]: Analyzing trace with hash 915375615, now seen corresponding path program 5 times [2020-11-07 01:57:22,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:22,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042123359] [2020-11-07 01:57:22,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:22,061 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:22,063 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:22,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:22,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042123359] [2020-11-07 01:57:22,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:22,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 01:57:22,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799747482] [2020-11-07 01:57:22,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 01:57:22,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:22,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 01:57:22,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:57:22,265 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand 12 states. [2020-11-07 01:57:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:22,777 INFO L93 Difference]: Finished difference Result 200 states and 209 transitions. [2020-11-07 01:57:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 01:57:22,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-11-07 01:57:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:22,782 INFO L225 Difference]: With dead ends: 200 [2020-11-07 01:57:22,783 INFO L226 Difference]: Without dead ends: 179 [2020-11-07 01:57:22,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-11-07 01:57:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-07 01:57:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 133. [2020-11-07 01:57:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-07 01:57:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2020-11-07 01:57:22,808 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 78 [2020-11-07 01:57:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:22,809 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2020-11-07 01:57:22,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 01:57:22,809 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2020-11-07 01:57:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-07 01:57:22,810 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:22,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:57:22,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 01:57:22,811 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:22,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1276983889, now seen corresponding path program 6 times [2020-11-07 01:57:22,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:22,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373313957] [2020-11-07 01:57:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:22,867 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:22,868 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:22,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:57:23,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373313957] [2020-11-07 01:57:23,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:23,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-07 01:57:23,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904467000] [2020-11-07 01:57:23,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 01:57:23,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:23,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 01:57:23,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-11-07 01:57:23,015 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand 13 states. [2020-11-07 01:57:23,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:23,525 INFO L93 Difference]: Finished difference Result 199 states and 206 transitions. [2020-11-07 01:57:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 01:57:23,525 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 81 [2020-11-07 01:57:23,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:23,527 INFO L225 Difference]: With dead ends: 199 [2020-11-07 01:57:23,528 INFO L226 Difference]: Without dead ends: 168 [2020-11-07 01:57:23,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-11-07 01:57:23,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-11-07 01:57:23,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 133. [2020-11-07 01:57:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-07 01:57:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2020-11-07 01:57:23,558 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 81 [2020-11-07 01:57:23,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:23,558 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2020-11-07 01:57:23,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 01:57:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2020-11-07 01:57:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-07 01:57:23,559 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:23,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-11-07 01:57:23,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 01:57:23,560 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:23,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1019615281, now seen corresponding path program 2 times [2020-11-07 01:57:23,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:23,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678544188] [2020-11-07 01:57:23,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:23,616 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:23,618 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:57:23,657 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:57:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:57:23,718 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:57:23,769 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 01:57:23,769 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 01:57:23,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 01:57:23,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:57:23 BoogieIcfgContainer [2020-11-07 01:57:23,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 01:57:23,792 INFO L168 Benchmark]: Toolchain (without parser) took 11953.60 ms. Allocated memory was 162.5 MB in the beginning and 317.7 MB in the end (delta: 155.2 MB). Free memory was 137.8 MB in the beginning and 207.5 MB in the end (delta: -69.8 MB). Peak memory consumption was 85.6 MB. Max. memory is 8.0 GB. [2020-11-07 01:57:23,793 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 162.5 MB. Free memory is still 136.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 01:57:23,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.94 ms. Allocated memory is still 162.5 MB. Free memory was 137.2 MB in the beginning and 127.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 01:57:23,794 INFO L168 Benchmark]: Boogie Preprocessor took 37.99 ms. Allocated memory is still 162.5 MB. Free memory was 127.4 MB in the beginning and 126.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 01:57:23,795 INFO L168 Benchmark]: RCFGBuilder took 644.03 ms. Allocated memory is still 162.5 MB. Free memory was 125.8 MB in the beginning and 141.2 MB in the end (delta: -15.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 8.0 GB. [2020-11-07 01:57:23,795 INFO L168 Benchmark]: TraceAbstraction took 10917.71 ms. Allocated memory was 162.5 MB in the beginning and 317.7 MB in the end (delta: 155.2 MB). Free memory was 140.7 MB in the beginning and 207.5 MB in the end (delta: -66.9 MB). Peak memory consumption was 87.8 MB. Max. memory is 8.0 GB. [2020-11-07 01:57:23,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 162.5 MB. Free memory is still 136.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 337.94 ms. Allocated memory is still 162.5 MB. Free memory was 137.2 MB in the beginning and 127.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.99 ms. Allocated memory is still 162.5 MB. Free memory was 127.4 MB in the beginning and 126.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 644.03 ms. Allocated memory is still 162.5 MB. Free memory was 125.8 MB in the beginning and 141.2 MB in the end (delta: -15.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10917.71 ms. Allocated memory was 162.5 MB in the beginning and 317.7 MB in the end (delta: 155.2 MB). Free memory was 140.7 MB in the beginning and 207.5 MB in the end (delta: -66.9 MB). Peak memory consumption was 87.8 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: [L16] int MAX = __VERIFIER_nondet_uint(); [L17] COND FALSE !(!(MAX > 0)) [L18] char str1[MAX], str2[MAX]; [L19] int cont, i, j; [L20] cont = 0 [L22] i=0 [L22] COND TRUE i= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- [L29] COND TRUE i >= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- [L29] COND FALSE !(i >= 0) [L34] j = MAX-1 [L35] i=0 [L35] COND TRUE i