/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/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:08:06,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:08:06,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:08:06,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 02:08:06,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:08:06,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:08:06,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:08:06,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:08:06,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:08:06,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:08:06,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:08:07,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:08:07,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:08:07,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:08:07,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:08:07,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:08:07,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 02:08:07,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 02:08:07,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 02:08:07,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 02:08:07,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 02:08:07,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 02:08:07,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 02:08:07,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 02:08:07,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 02:08:07,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:08:07,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:08:07,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:08:07,040 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 02:08:07,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:08:07,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:08:07,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:08:07,072 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:08:07,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:08:07,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:08:07,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:08:07,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:08:07,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:08:07,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:08:07,075 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:08:07,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:08:07,075 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:08:07,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:08:07,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:08:07,077 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:08:07,077 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:08:07,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:08:07,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:08:07,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:08:07,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:08:07,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:08:07,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:08:07,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:08:07,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:08:07,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:08:07,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:08:07,664 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:08:07,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-11-07 02:08:07,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d5a62cd/2ec6c65016884698b9f7cd4628524bb0/FLAGd1c3d10d6 [2020-11-07 02:08:08,498 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:08:08,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2020-11-07 02:08:08,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d5a62cd/2ec6c65016884698b9f7cd4628524bb0/FLAGd1c3d10d6 [2020-11-07 02:08:08,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d5a62cd/2ec6c65016884698b9f7cd4628524bb0 [2020-11-07 02:08:08,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:08:08,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:08:08,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:08:08,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:08:08,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:08:08,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:08" (1/1) ... [2020-11-07 02:08:08,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@671bef98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:08, skipping insertion in model container [2020-11-07 02:08:08,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:08:08" (1/1) ... [2020-11-07 02:08:08,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:08:08,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:08:09,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:08:09,195 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:08:09,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:08:09,249 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:08:09,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:09 WrapperNode [2020-11-07 02:08:09,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:08:09,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:08:09,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:08:09,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:08:09,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:09" (1/1) ... [2020-11-07 02:08:09,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:09" (1/1) ... [2020-11-07 02:08:09,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:09" (1/1) ... [2020-11-07 02:08:09,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:09" (1/1) ... [2020-11-07 02:08:09,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:09" (1/1) ... [2020-11-07 02:08:09,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:09" (1/1) ... [2020-11-07 02:08:09,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:09" (1/1) ... [2020-11-07 02:08:09,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:08:09,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:08:09,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:08:09,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:08:09,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:09" (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 02:08:09,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:08:09,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:08:09,467 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:08:09,468 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:08:09,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:08:09,468 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:08:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:08:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:08:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 02:08:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 02:08:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:08:09,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:08:09,470 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:08:09,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:08:09,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:08:09,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:08:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:08:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:08:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:08:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:08:09,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:08:09,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:08:10,095 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:08:10,096 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 02:08:10,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:10 BoogieIcfgContainer [2020-11-07 02:08:10,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:08:10,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:08:10,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:08:10,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:08:10,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:08:08" (1/3) ... [2020-11-07 02:08:10,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74470c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:10, skipping insertion in model container [2020-11-07 02:08:10,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:08:09" (2/3) ... [2020-11-07 02:08:10,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74470c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:08:10, skipping insertion in model container [2020-11-07 02:08:10,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:08:10" (3/3) ... [2020-11-07 02:08:10,111 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-11-07 02:08:10,129 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:08:10,134 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:08:10,152 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:08:10,186 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:08:10,186 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:08:10,187 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:08:10,187 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:08:10,187 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:08:10,187 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:08:10,187 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:08:10,187 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:08:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-11-07 02:08:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 02:08:10,227 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:10,228 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] [2020-11-07 02:08:10,229 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:10,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:10,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1720334319, now seen corresponding path program 1 times [2020-11-07 02:08:10,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:10,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449863946] [2020-11-07 02:08:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:10,354 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:10,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:10,858 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 02:08:10,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449863946] [2020-11-07 02:08:10,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:10,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:08:10,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970091555] [2020-11-07 02:08:10,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:08:10,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:10,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:08:10,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:08:10,893 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 8 states. [2020-11-07 02:08:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:11,776 INFO L93 Difference]: Finished difference Result 127 states and 161 transitions. [2020-11-07 02:08:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 02:08:11,779 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-11-07 02:08:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:11,791 INFO L225 Difference]: With dead ends: 127 [2020-11-07 02:08:11,792 INFO L226 Difference]: Without dead ends: 84 [2020-11-07 02:08:11,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:08:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-07 02:08:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-11-07 02:08:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 02:08:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-11-07 02:08:11,882 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 43 [2020-11-07 02:08:11,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:11,883 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-11-07 02:08:11,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:08:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-11-07 02:08:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 02:08:11,887 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:11,889 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:11,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:08:11,890 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:11,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:11,891 INFO L82 PathProgramCache]: Analyzing trace with hash -545340875, now seen corresponding path program 1 times [2020-11-07 02:08:11,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:11,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815526816] [2020-11-07 02:08:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:11,987 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:11,990 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:12,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:12,236 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 02:08:12,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815526816] [2020-11-07 02:08:12,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:12,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 02:08:12,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514301377] [2020-11-07 02:08:12,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 02:08:12,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:12,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 02:08:12,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:08:12,241 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 10 states. [2020-11-07 02:08:12,673 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-11-07 02:08:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:13,348 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2020-11-07 02:08:13,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 02:08:13,348 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-11-07 02:08:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:13,354 INFO L225 Difference]: With dead ends: 97 [2020-11-07 02:08:13,354 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 02:08:13,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-11-07 02:08:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 02:08:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-11-07 02:08:13,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 02:08:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-11-07 02:08:13,392 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 49 [2020-11-07 02:08:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:13,393 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-11-07 02:08:13,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 02:08:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-11-07 02:08:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 02:08:13,396 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:13,396 INFO L422 BasicCegarLoop]: trace histogram [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 02:08:13,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:08:13,397 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:13,398 INFO L82 PathProgramCache]: Analyzing trace with hash 752260360, now seen corresponding path program 1 times [2020-11-07 02:08:13,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:13,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201637075] [2020-11-07 02:08:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:13,437 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:13,440 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:13,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:13,593 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 02:08:13,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201637075] [2020-11-07 02:08:13,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:13,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:08:13,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125119165] [2020-11-07 02:08:13,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:08:13,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:13,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:08:13,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:08:13,597 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 6 states. [2020-11-07 02:08:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:14,011 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-11-07 02:08:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:08:14,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-11-07 02:08:14,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:14,017 INFO L225 Difference]: With dead ends: 150 [2020-11-07 02:08:14,017 INFO L226 Difference]: Without dead ends: 100 [2020-11-07 02:08:14,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:08:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-07 02:08:14,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2020-11-07 02:08:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-07 02:08:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-11-07 02:08:14,086 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 55 [2020-11-07 02:08:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:14,090 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-11-07 02:08:14,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:08:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-11-07 02:08:14,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 02:08:14,102 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:14,104 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, 1, 1, 1] [2020-11-07 02:08:14,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:08:14,104 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:14,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1337397749, now seen corresponding path program 1 times [2020-11-07 02:08:14,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:14,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711100717] [2020-11-07 02:08:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:14,144 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:14,147 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:14,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:14,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-07 02:08:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:14,324 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 02:08:14,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711100717] [2020-11-07 02:08:14,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:14,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 02:08:14,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765689066] [2020-11-07 02:08:14,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 02:08:14,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:14,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 02:08:14,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:08:14,328 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 9 states. [2020-11-07 02:08:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:15,112 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2020-11-07 02:08:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 02:08:15,116 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-11-07 02:08:15,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:15,119 INFO L225 Difference]: With dead ends: 142 [2020-11-07 02:08:15,120 INFO L226 Difference]: Without dead ends: 89 [2020-11-07 02:08:15,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-11-07 02:08:15,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-07 02:08:15,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-11-07 02:08:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-07 02:08:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-11-07 02:08:15,164 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 64 [2020-11-07 02:08:15,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:15,165 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-11-07 02:08:15,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 02:08:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-11-07 02:08:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-07 02:08:15,168 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:15,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2020-11-07 02:08:15,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:08:15,169 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:15,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2108788121, now seen corresponding path program 2 times [2020-11-07 02:08:15,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:15,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122530602] [2020-11-07 02:08:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:15,231 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:15,235 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:15,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:15,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-07 02:08:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:15,435 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 02:08:15,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122530602] [2020-11-07 02:08:15,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:15,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:08:15,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775870718] [2020-11-07 02:08:15,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:08:15,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:08:15,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:08:15,438 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 8 states. [2020-11-07 02:08:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:16,018 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-11-07 02:08:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 02:08:16,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-11-07 02:08:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:16,023 INFO L225 Difference]: With dead ends: 116 [2020-11-07 02:08:16,027 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 02:08:16,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-11-07 02:08:16,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 02:08:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-11-07 02:08:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-07 02:08:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2020-11-07 02:08:16,076 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 70 [2020-11-07 02:08:16,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:16,077 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2020-11-07 02:08:16,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:08:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2020-11-07 02:08:16,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-07 02:08:16,079 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:16,079 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-11-07 02:08:16,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:08:16,080 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash -469024378, now seen corresponding path program 3 times [2020-11-07 02:08:16,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:16,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787503344] [2020-11-07 02:08:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:16,135 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:16,137 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:16,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:16,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-07 02:08:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:16,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-07 02:08:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:16,382 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 02:08:16,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787503344] [2020-11-07 02:08:16,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:16,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 02:08:16,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602465468] [2020-11-07 02:08:16,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 02:08:16,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:16,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 02:08:16,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:08:16,387 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand 10 states. [2020-11-07 02:08:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:17,267 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2020-11-07 02:08:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 02:08:17,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-11-07 02:08:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:17,270 INFO L225 Difference]: With dead ends: 146 [2020-11-07 02:08:17,270 INFO L226 Difference]: Without dead ends: 142 [2020-11-07 02:08:17,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-11-07 02:08:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-07 02:08:17,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 102. [2020-11-07 02:08:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-07 02:08:17,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-11-07 02:08:17,298 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 79 [2020-11-07 02:08:17,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:17,299 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-11-07 02:08:17,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 02:08:17,299 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-11-07 02:08:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-07 02:08:17,300 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:17,301 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:17,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:08:17,301 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:17,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1389623993, now seen corresponding path program 4 times [2020-11-07 02:08:17,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:17,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219591713] [2020-11-07 02:08:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:17,372 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:17,374 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:17,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:17,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-07 02:08:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:17,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-07 02:08:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:17,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-11-07 02:08:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:17,653 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 02:08:17,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219591713] [2020-11-07 02:08:17,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:17,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 02:08:17,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185425305] [2020-11-07 02:08:17,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 02:08:17,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:17,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 02:08:17,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-11-07 02:08:17,660 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 12 states. [2020-11-07 02:08:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:18,714 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2020-11-07 02:08:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 02:08:18,714 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 88 [2020-11-07 02:08:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:18,717 INFO L225 Difference]: With dead ends: 176 [2020-11-07 02:08:18,717 INFO L226 Difference]: Without dead ends: 172 [2020-11-07 02:08:18,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2020-11-07 02:08:18,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-07 02:08:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 111. [2020-11-07 02:08:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-11-07 02:08:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-11-07 02:08:18,745 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 88 [2020-11-07 02:08:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:18,746 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-11-07 02:08:18,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 02:08:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-11-07 02:08:18,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 02:08:18,747 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:18,748 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:08:18,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 02:08:18,748 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1150610086, now seen corresponding path program 5 times [2020-11-07 02:08:18,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:18,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688224761] [2020-11-07 02:08:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:18,819 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:18,821 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:19,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:19,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-07 02:08:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:19,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-07 02:08:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:19,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-11-07 02:08:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:19,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-11-07 02:08:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:19,204 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 02:08:19,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688224761] [2020-11-07 02:08:19,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:19,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 02:08:19,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020669708] [2020-11-07 02:08:19,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 02:08:19,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:19,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 02:08:19,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-11-07 02:08:19,208 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 16 states. [2020-11-07 02:08:21,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:21,861 INFO L93 Difference]: Finished difference Result 163 states and 182 transitions. [2020-11-07 02:08:21,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-07 02:08:21,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-11-07 02:08:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:21,865 INFO L225 Difference]: With dead ends: 163 [2020-11-07 02:08:21,865 INFO L226 Difference]: Without dead ends: 159 [2020-11-07 02:08:21,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=444, Invalid=1812, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 02:08:21,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-07 02:08:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 132. [2020-11-07 02:08:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-07 02:08:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 148 transitions. [2020-11-07 02:08:21,897 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 148 transitions. Word has length 97 [2020-11-07 02:08:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:21,898 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 148 transitions. [2020-11-07 02:08:21,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 02:08:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 148 transitions. [2020-11-07 02:08:21,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-07 02:08:21,899 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:21,900 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:08:21,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 02:08:21,900 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:21,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1372166708, now seen corresponding path program 6 times [2020-11-07 02:08:21,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:21,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231597176] [2020-11-07 02:08:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:21,963 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:21,965 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:22,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:22,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-07 02:08:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:22,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-07 02:08:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:22,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-07 02:08:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:22,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-11-07 02:08:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:22,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-11-07 02:08:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-07 02:08:22,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231597176] [2020-11-07 02:08:22,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:22,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 02:08:22,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935219136] [2020-11-07 02:08:22,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 02:08:22,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:22,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 02:08:22,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:08:22,099 INFO L87 Difference]: Start difference. First operand 132 states and 148 transitions. Second operand 7 states. [2020-11-07 02:08:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:22,600 INFO L93 Difference]: Finished difference Result 214 states and 243 transitions. [2020-11-07 02:08:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 02:08:22,602 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2020-11-07 02:08:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:22,604 INFO L225 Difference]: With dead ends: 214 [2020-11-07 02:08:22,604 INFO L226 Difference]: Without dead ends: 134 [2020-11-07 02:08:22,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-11-07 02:08:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-11-07 02:08:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2020-11-07 02:08:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-07 02:08:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 147 transitions. [2020-11-07 02:08:22,632 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 147 transitions. Word has length 112 [2020-11-07 02:08:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:22,633 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 147 transitions. [2020-11-07 02:08:22,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 02:08:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 147 transitions. [2020-11-07 02:08:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-07 02:08:22,635 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:22,635 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-11-07 02:08:22,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 02:08:22,635 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:22,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2139141218, now seen corresponding path program 7 times [2020-11-07 02:08:22,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:22,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759114956] [2020-11-07 02:08:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:22,958 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:22,960 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-07 02:08:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-07 02:08:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-07 02:08:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-11-07 02:08:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-11-07 02:08:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-11-07 02:08:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-07 02:08:23,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759114956] [2020-11-07 02:08:23,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:08:23,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:08:23,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792267275] [2020-11-07 02:08:23,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:08:23,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:08:23,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:08:23,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:08:23,264 INFO L87 Difference]: Start difference. First operand 132 states and 147 transitions. Second operand 8 states. [2020-11-07 02:08:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:23,726 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2020-11-07 02:08:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:08:23,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-11-07 02:08:23,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:23,728 INFO L225 Difference]: With dead ends: 132 [2020-11-07 02:08:23,728 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 02:08:23,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-11-07 02:08:23,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 02:08:23,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 02:08:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 02:08:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 02:08:23,734 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 127 [2020-11-07 02:08:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:23,735 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 02:08:23,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:08:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 02:08:23,735 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 02:08:23,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 02:08:23,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 02:08:23,872 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 54 [2020-11-07 02:08:24,328 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2020-11-07 02:08:24,470 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-11-07 02:08:25,372 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 18 [2020-11-07 02:08:25,482 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 12 [2020-11-07 02:08:25,850 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 12) the Hoare annotation is: true [2020-11-07 02:08:25,850 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-11-07 02:08:25,850 INFO L269 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-11-07 02:08:25,850 INFO L269 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-11-07 02:08:25,850 INFO L269 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-11-07 02:08:25,851 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: true [2020-11-07 02:08:25,851 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 02:08:25,851 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 02:08:25,851 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-11-07 02:08:25,851 INFO L269 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-11-07 02:08:25,851 INFO L269 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-11-07 02:08:25,852 INFO L269 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-11-07 02:08:25,852 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__BLAST_NONDET~0 |old(~__BLAST_NONDET~0)|) (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-11-07 02:08:25,852 INFO L269 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-11-07 02:08:25,852 INFO L269 CegarLoopResult]: At program point L12-4(line 12) the Hoare annotation is: true [2020-11-07 02:08:25,852 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 02:08:25,853 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 02:08:25,853 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 02:08:25,853 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 02:08:25,853 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 02:08:25,853 INFO L266 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-07 02:08:25,854 INFO L266 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-07 02:08:25,854 INFO L266 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-11-07 02:08:25,854 INFO L266 CegarLoopResult]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2020-11-07 02:08:25,854 INFO L266 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-11-07 02:08:25,854 INFO L262 CegarLoopResult]: At program point L35-3(lines 35 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-11-07 02:08:25,855 INFO L269 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-11-07 02:08:25,855 INFO L262 CegarLoopResult]: At program point L35-4(line 35) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-11-07 02:08:25,855 INFO L269 CegarLoopResult]: At program point L31-1(line 31) the Hoare annotation is: true [2020-11-07 02:08:25,855 INFO L262 CegarLoopResult]: At program point L35-5(line 35) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~i~0 1) main_~n~0)) [2020-11-07 02:08:25,855 INFO L262 CegarLoopResult]: At program point L35-6(lines 35 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~i~0 1) main_~n~0)) [2020-11-07 02:08:25,856 INFO L269 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: true [2020-11-07 02:08:25,856 INFO L269 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: true [2020-11-07 02:08:25,856 INFO L269 CegarLoopResult]: At program point L27-2(line 27) the Hoare annotation is: true [2020-11-07 02:08:25,856 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 25 40) the Hoare annotation is: true [2020-11-07 02:08:25,856 INFO L262 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-11-07 02:08:25,856 INFO L262 CegarLoopResult]: At program point L36-3(line 36) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~k~0 1) main_~j~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-11-07 02:08:25,857 INFO L269 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: true [2020-11-07 02:08:25,857 INFO L262 CegarLoopResult]: At program point L36-4(line 36) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-11-07 02:08:25,857 INFO L269 CegarLoopResult]: At program point L32-1(line 32) the Hoare annotation is: true [2020-11-07 02:08:25,857 INFO L262 CegarLoopResult]: At program point L36-5(lines 36 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-11-07 02:08:25,857 INFO L269 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: true [2020-11-07 02:08:25,857 INFO L269 CegarLoopResult]: At program point L28-1(line 28) the Hoare annotation is: true [2020-11-07 02:08:25,858 INFO L269 CegarLoopResult]: At program point L28-2(line 28) the Hoare annotation is: true [2020-11-07 02:08:25,858 INFO L262 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~k~0 1) main_~j~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-11-07 02:08:25,858 INFO L262 CegarLoopResult]: At program point L37-1(lines 36 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~k~0 1) main_~j~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-11-07 02:08:25,858 INFO L269 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: true [2020-11-07 02:08:25,858 INFO L269 CegarLoopResult]: At program point L33-1(line 33) the Hoare annotation is: true [2020-11-07 02:08:25,858 INFO L269 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: true [2020-11-07 02:08:25,859 INFO L269 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: true [2020-11-07 02:08:25,859 INFO L269 CegarLoopResult]: At program point L29-2(line 29) the Hoare annotation is: true [2020-11-07 02:08:25,859 INFO L269 CegarLoopResult]: At program point mainFINAL(lines 25 40) the Hoare annotation is: true [2020-11-07 02:08:25,859 INFO L269 CegarLoopResult]: At program point L38(lines 25 40) the Hoare annotation is: true [2020-11-07 02:08:25,860 INFO L262 CegarLoopResult]: At program point L34-2(lines 34 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (* 3 main_~i~0) main_~j~0) (<= (+ main_~i~0 1) main_~n~0)) [2020-11-07 02:08:25,860 INFO L262 CegarLoopResult]: At program point L34-3(line 34) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (* 3 main_~i~0) main_~j~0) (<= (+ main_~i~0 1) main_~n~0) (<= (+ |main_#t~post6| 2) (* 2 main_~n~0))) [2020-11-07 02:08:25,860 INFO L269 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-11-07 02:08:25,860 INFO L262 CegarLoopResult]: At program point L34-4(line 34) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (and (<= 1 main_~n~0) (<= (+ main_~i~0 1) .cse0) (<= (+ |main_#t~post6| 2) .cse0))) [2020-11-07 02:08:25,861 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 25 40) the Hoare annotation is: true [2020-11-07 02:08:25,861 INFO L269 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: true [2020-11-07 02:08:25,861 INFO L262 CegarLoopResult]: At program point L34-5(lines 34 37) the Hoare annotation is: (or (= main_~i~0 0) (and (<= 1 main_~n~0) (<= (+ main_~i~0 1) (* 2 main_~n~0)))) [2020-11-07 02:08:25,861 INFO L269 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-11-07 02:08:25,861 INFO L269 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: true [2020-11-07 02:08:25,861 INFO L269 CegarLoopResult]: At program point L26-2(line 26) the Hoare annotation is: true [2020-11-07 02:08:25,862 INFO L269 CegarLoopResult]: At program point L26-3(line 26) the Hoare annotation is: true [2020-11-07 02:08:25,862 INFO L269 CegarLoopResult]: At program point L26-4(line 26) the Hoare annotation is: true [2020-11-07 02:08:25,862 INFO L262 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~i~0 1) main_~n~0)) [2020-11-07 02:08:25,862 INFO L262 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 02:08:25,862 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-11-07 02:08:25,863 INFO L262 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 02:08:25,863 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 02:08:25,863 INFO L262 CegarLoopResult]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 02:08:25,863 INFO L262 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 02:08:25,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:08:25 BoogieIcfgContainer [2020-11-07 02:08:25,891 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 02:08:25,893 INFO L168 Benchmark]: Toolchain (without parser) took 17040.17 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 127.5 MB in the beginning and 262.7 MB in the end (delta: -135.2 MB). Peak memory consumption was 153.6 MB. Max. memory is 8.0 GB. [2020-11-07 02:08:25,895 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 125.8 MB. Free memory was 104.2 MB in the beginning and 104.1 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 02:08:25,896 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.01 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 116.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 02:08:25,897 INFO L168 Benchmark]: Boogie Preprocessor took 86.55 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 02:08:25,897 INFO L168 Benchmark]: RCFGBuilder took 755.00 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 130.0 MB in the end (delta: -14.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. [2020-11-07 02:08:25,899 INFO L168 Benchmark]: TraceAbstraction took 15790.06 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 130.0 MB in the beginning and 262.7 MB in the end (delta: -132.7 MB). Peak memory consumption was 155.1 MB. Max. memory is 8.0 GB. [2020-11-07 02:08:25,903 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 125.8 MB. Free memory was 104.2 MB in the beginning and 104.1 MB in the end (delta: 125.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 383.01 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 116.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 86.55 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 755.00 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 130.0 MB in the end (delta: -14.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15790.06 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 130.0 MB in the beginning and 262.7 MB in the end (delta: -132.7 MB). Peak memory consumption was 155.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 1 <= n && i + 1 <= n - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: i == 0 || (1 <= n && i + 1 <= 2 * n) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (1 <= n && j + 1 <= 3 * i) && i + 1 <= n - ProcedureContractResult [Line: 12]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 25]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.5s, OverallIterations: 10, TraceHistogramMax: 7, AutomataDifference: 9.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 481 SDtfs, 1141 SDslu, 840 SDs, 0 SdLazy, 2983 SolverSat, 204 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 253 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 183 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 67 LocationsWithAnnotation, 271 PreInvPairs, 369 NumberOfFragments, 342 HoareAnnotationTreeSize, 271 FomulaSimplifications, 1359927 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 67 FomulaSimplificationsInter, 3552 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, 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 correct! Received shutdown request...