/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:35:14,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:35:14,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:35:14,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:35:14,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:35:14,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:35:14,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:35:14,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:35:14,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:35:14,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:35:14,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:35:14,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:35:14,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:35:14,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:35:14,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:35:14,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:35:14,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:35:14,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:35:14,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:35:14,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:35:14,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:35:14,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:35:14,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:35:14,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:35:14,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:35:14,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:35:14,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:35:14,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:35:14,577 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 06:35:14,597 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:35:14,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:35:14,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:35:14,603 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:35:14,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:35:14,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:35:14,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:35:14,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:35:14,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:35:14,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:35:14,605 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:35:14,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:35:14,606 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:35:14,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:35:14,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:35:14,606 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:35:14,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:35:14,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:35:14,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:14,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:35:14,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:35:14,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:35:14,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:35:15,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:35:15,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:35:15,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:35:15,064 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:35:15,065 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:35:15,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-11-07 06:35:15,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/993c30519/c5ea47d1b91f49b9a5ef71a832b04d52/FLAGca1cdbe15 [2020-11-07 06:35:15,764 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:35:15,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2020-11-07 06:35:15,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/993c30519/c5ea47d1b91f49b9a5ef71a832b04d52/FLAGca1cdbe15 [2020-11-07 06:35:16,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/993c30519/c5ea47d1b91f49b9a5ef71a832b04d52 [2020-11-07 06:35:16,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:35:16,137 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:35:16,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:16,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:35:16,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:35:16,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:16" (1/1) ... [2020-11-07 06:35:16,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cbadeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:16, skipping insertion in model container [2020-11-07 06:35:16,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:16" (1/1) ... [2020-11-07 06:35:16,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:35:16,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:35:16,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:16,366 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:35:16,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:16,407 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:35:16,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:16 WrapperNode [2020-11-07 06:35:16,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:16,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:35:16,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:35:16,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:35:16,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:16" (1/1) ... [2020-11-07 06:35:16,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:16" (1/1) ... [2020-11-07 06:35:16,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:16" (1/1) ... [2020-11-07 06:35:16,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:16" (1/1) ... [2020-11-07 06:35:16,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:16" (1/1) ... [2020-11-07 06:35:16,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:16" (1/1) ... [2020-11-07 06:35:16,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:16" (1/1) ... [2020-11-07 06:35:16,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:35:16,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:35:16,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:35:16,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:35:16,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:16" (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 06:35:16,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:35:16,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:35:16,543 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:35:16,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:35:16,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:35:16,543 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:35:16,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:35:16,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 06:35:16,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 06:35:16,544 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:35:16,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:35:16,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:35:16,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 06:35:16,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:35:16,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:35:16,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:35:16,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:35:16,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:35:16,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:35:16,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:35:16,839 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:35:16,840 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:35:16,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:16 BoogieIcfgContainer [2020-11-07 06:35:16,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:35:16,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:35:16,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:35:16,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:35:16,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:35:16" (1/3) ... [2020-11-07 06:35:16,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4866b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:16, skipping insertion in model container [2020-11-07 06:35:16,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:16" (2/3) ... [2020-11-07 06:35:16,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4866b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:16, skipping insertion in model container [2020-11-07 06:35:16,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:16" (3/3) ... [2020-11-07 06:35:16,853 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-11-07 06:35:16,873 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:35:16,882 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:35:16,910 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:35:16,964 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:35:16,965 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:35:16,965 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:35:16,965 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:35:16,965 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:35:16,966 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:35:16,966 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:35:16,971 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:35:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-11-07 06:35:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-07 06:35:17,000 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:17,001 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] [2020-11-07 06:35:17,002 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:17,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1475454684, now seen corresponding path program 1 times [2020-11-07 06:35:17,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:17,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860636176] [2020-11-07 06:35:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:17,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:17,325 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 06:35:17,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860636176] [2020-11-07 06:35:17,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:17,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:35:17,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942591593] [2020-11-07 06:35:17,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:35:17,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:17,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:35:17,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:35:17,354 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-11-07 06:35:17,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:17,468 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-11-07 06:35:17,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:35:17,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-07 06:35:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:17,480 INFO L225 Difference]: With dead ends: 52 [2020-11-07 06:35:17,481 INFO L226 Difference]: Without dead ends: 29 [2020-11-07 06:35:17,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:35:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-07 06:35:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-07 06:35:17,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-07 06:35:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-11-07 06:35:17,537 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2020-11-07 06:35:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:17,538 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-11-07 06:35:17,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:35:17,538 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-11-07 06:35:17,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-07 06:35:17,539 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:17,539 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] [2020-11-07 06:35:17,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:35:17,540 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:17,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1935305038, now seen corresponding path program 1 times [2020-11-07 06:35:17,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:17,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811449744] [2020-11-07 06:35:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:17,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:17,704 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 06:35:17,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811449744] [2020-11-07 06:35:17,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:17,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 06:35:17,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642998636] [2020-11-07 06:35:17,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:17,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:17,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:17,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:17,710 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2020-11-07 06:35:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:18,086 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-11-07 06:35:18,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:35:18,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-07 06:35:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:18,089 INFO L225 Difference]: With dead ends: 42 [2020-11-07 06:35:18,089 INFO L226 Difference]: Without dead ends: 35 [2020-11-07 06:35:18,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:35:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-07 06:35:18,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-11-07 06:35:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-07 06:35:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-07 06:35:18,104 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 23 [2020-11-07 06:35:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:18,105 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-07 06:35:18,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-07 06:35:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-07 06:35:18,106 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:18,106 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] [2020-11-07 06:35:18,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:35:18,107 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:18,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1625328538, now seen corresponding path program 1 times [2020-11-07 06:35:18,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:18,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215865642] [2020-11-07 06:35:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:18,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:18,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215865642] [2020-11-07 06:35:18,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:18,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:18,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012115096] [2020-11-07 06:35:18,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:18,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:18,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:18,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:18,720 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 12 states. [2020-11-07 06:35:19,266 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-11-07 06:35:19,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:19,656 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-11-07 06:35:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:19,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-11-07 06:35:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:19,658 INFO L225 Difference]: With dead ends: 61 [2020-11-07 06:35:19,658 INFO L226 Difference]: Without dead ends: 40 [2020-11-07 06:35:19,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-11-07 06:35:19,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-07 06:35:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-11-07 06:35:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-07 06:35:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-07 06:35:19,673 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2020-11-07 06:35:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:19,674 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-07 06:35:19,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-07 06:35:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 06:35:19,676 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:19,676 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] [2020-11-07 06:35:19,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:35:19,676 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1487589007, now seen corresponding path program 1 times [2020-11-07 06:35:19,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:19,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863558244] [2020-11-07 06:35:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:19,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:19,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863558244] [2020-11-07 06:35:19,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:19,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:35:19,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530964976] [2020-11-07 06:35:19,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:19,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:19,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:19,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:19,812 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 6 states. [2020-11-07 06:35:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:20,092 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-11-07 06:35:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:35:20,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-11-07 06:35:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:20,094 INFO L225 Difference]: With dead ends: 53 [2020-11-07 06:35:20,095 INFO L226 Difference]: Without dead ends: 40 [2020-11-07 06:35:20,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:20,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-07 06:35:20,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-11-07 06:35:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 06:35:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-11-07 06:35:20,124 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-11-07 06:35:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:20,125 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-11-07 06:35:20,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-11-07 06:35:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-07 06:35:20,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:20,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:20,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:35:20,129 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:20,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:20,130 INFO L82 PathProgramCache]: Analyzing trace with hash -45757058, now seen corresponding path program 2 times [2020-11-07 06:35:20,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:20,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555381806] [2020-11-07 06:35:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:20,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:20,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555381806] [2020-11-07 06:35:20,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:20,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-07 06:35:20,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557439909] [2020-11-07 06:35:20,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 06:35:20,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:20,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 06:35:20,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:35:20,528 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 15 states. [2020-11-07 06:35:21,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:21,655 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-11-07 06:35:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 06:35:21,659 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-11-07 06:35:21,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:21,661 INFO L225 Difference]: With dead ends: 53 [2020-11-07 06:35:21,661 INFO L226 Difference]: Without dead ends: 46 [2020-11-07 06:35:21,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:35:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-07 06:35:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-11-07 06:35:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-07 06:35:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-11-07 06:35:21,678 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 35 [2020-11-07 06:35:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:21,678 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-11-07 06:35:21,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 06:35:21,678 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-11-07 06:35:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-07 06:35:21,680 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:21,680 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:21,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:35:21,682 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:21,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:21,682 INFO L82 PathProgramCache]: Analyzing trace with hash 959629145, now seen corresponding path program 2 times [2020-11-07 06:35:21,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:21,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242704353] [2020-11-07 06:35:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:21,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:21,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242704353] [2020-11-07 06:35:21,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:21,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:35:21,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143810092] [2020-11-07 06:35:21,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:35:21,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:21,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:35:21,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:21,840 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2020-11-07 06:35:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:22,189 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-11-07 06:35:22,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 06:35:22,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-11-07 06:35:22,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:22,192 INFO L225 Difference]: With dead ends: 59 [2020-11-07 06:35:22,192 INFO L226 Difference]: Without dead ends: 46 [2020-11-07 06:35:22,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:35:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-07 06:35:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-11-07 06:35:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-07 06:35:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-11-07 06:35:22,207 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-11-07 06:35:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:22,208 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-11-07 06:35:22,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:35:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-11-07 06:35:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 06:35:22,209 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:22,209 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:22,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:35:22,210 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:22,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:22,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1491405674, now seen corresponding path program 3 times [2020-11-07 06:35:22,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:22,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702093705] [2020-11-07 06:35:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:22,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 06:35:22,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702093705] [2020-11-07 06:35:22,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:22,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-11-07 06:35:22,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219040433] [2020-11-07 06:35:22,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 06:35:22,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:22,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 06:35:22,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:35:22,641 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 17 states. [2020-11-07 06:35:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:23,824 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-11-07 06:35:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 06:35:23,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-11-07 06:35:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:23,826 INFO L225 Difference]: With dead ends: 58 [2020-11-07 06:35:23,826 INFO L226 Difference]: Without dead ends: 51 [2020-11-07 06:35:23,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2020-11-07 06:35:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-07 06:35:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-11-07 06:35:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-07 06:35:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-11-07 06:35:23,842 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 41 [2020-11-07 06:35:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:23,843 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-11-07 06:35:23,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 06:35:23,843 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-11-07 06:35:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-07 06:35:23,844 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:23,844 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:23,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:35:23,845 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:23,845 INFO L82 PathProgramCache]: Analyzing trace with hash 577916737, now seen corresponding path program 3 times [2020-11-07 06:35:23,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:23,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774212377] [2020-11-07 06:35:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:23,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774212377] [2020-11-07 06:35:23,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:23,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:35:23,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357604629] [2020-11-07 06:35:23,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:35:23,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:23,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:35:23,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:23,974 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 10 states. [2020-11-07 06:35:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:24,447 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-11-07 06:35:24,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:24,449 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-11-07 06:35:24,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:24,450 INFO L225 Difference]: With dead ends: 71 [2020-11-07 06:35:24,450 INFO L226 Difference]: Without dead ends: 58 [2020-11-07 06:35:24,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-07 06:35:24,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-11-07 06:35:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-07 06:35:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-11-07 06:35:24,476 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 46 [2020-11-07 06:35:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:24,476 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-11-07 06:35:24,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:35:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-11-07 06:35:24,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 06:35:24,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:24,478 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:24,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:35:24,479 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:24,479 INFO L82 PathProgramCache]: Analyzing trace with hash 978733353, now seen corresponding path program 4 times [2020-11-07 06:35:24,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:24,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202313210] [2020-11-07 06:35:24,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:24,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:24,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202313210] [2020-11-07 06:35:24,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:24,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:24,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655044209] [2020-11-07 06:35:24,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:24,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:24,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:24,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:24,721 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 12 states. [2020-11-07 06:35:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:25,370 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-11-07 06:35:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:35:25,370 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-11-07 06:35:25,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:25,372 INFO L225 Difference]: With dead ends: 77 [2020-11-07 06:35:25,372 INFO L226 Difference]: Without dead ends: 64 [2020-11-07 06:35:25,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:35:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-07 06:35:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-11-07 06:35:25,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 06:35:25,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-11-07 06:35:25,410 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 52 [2020-11-07 06:35:25,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:25,410 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-11-07 06:35:25,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-11-07 06:35:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 06:35:25,416 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:25,417 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:25,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:35:25,417 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:25,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:25,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2084648209, now seen corresponding path program 5 times [2020-11-07 06:35:25,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:25,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539947395] [2020-11-07 06:35:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:25,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:25,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539947395] [2020-11-07 06:35:25,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:25,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:35:25,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720907904] [2020-11-07 06:35:25,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:35:25,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:25,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:35:25,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:35:25,660 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 14 states. [2020-11-07 06:35:26,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:26,405 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-11-07 06:35:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:35:26,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-11-07 06:35:26,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:26,406 INFO L225 Difference]: With dead ends: 83 [2020-11-07 06:35:26,406 INFO L226 Difference]: Without dead ends: 70 [2020-11-07 06:35:26,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=591, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:35:26,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-07 06:35:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-11-07 06:35:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-07 06:35:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-11-07 06:35:26,423 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 58 [2020-11-07 06:35:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:26,424 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-11-07 06:35:26,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:35:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-11-07 06:35:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 06:35:26,425 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:26,425 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:26,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:35:26,426 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:26,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:26,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1874170617, now seen corresponding path program 6 times [2020-11-07 06:35:26,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:26,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443129528] [2020-11-07 06:35:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:26,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:26,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443129528] [2020-11-07 06:35:26,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:26,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:35:26,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840649529] [2020-11-07 06:35:26,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:35:26,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:26,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:35:26,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:35:26,724 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 16 states. [2020-11-07 06:35:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:27,694 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-11-07 06:35:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:35:27,694 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-11-07 06:35:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:27,695 INFO L225 Difference]: With dead ends: 89 [2020-11-07 06:35:27,695 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 06:35:27,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=375, Invalid=815, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:35:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 06:35:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-11-07 06:35:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-07 06:35:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-11-07 06:35:27,714 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 64 [2020-11-07 06:35:27,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:27,714 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-11-07 06:35:27,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:35:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-11-07 06:35:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-07 06:35:27,716 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:27,716 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:27,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 06:35:27,716 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:27,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1873419551, now seen corresponding path program 7 times [2020-11-07 06:35:27,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:27,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255117336] [2020-11-07 06:35:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:27,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255117336] [2020-11-07 06:35:27,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:27,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:35:27,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407541052] [2020-11-07 06:35:27,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:35:27,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:27,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:35:27,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:35:27,987 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 18 states. [2020-11-07 06:35:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:29,144 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-11-07 06:35:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:35:29,145 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-11-07 06:35:29,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:29,146 INFO L225 Difference]: With dead ends: 95 [2020-11-07 06:35:29,147 INFO L226 Difference]: Without dead ends: 82 [2020-11-07 06:35:29,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=485, Invalid=1075, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:35:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-07 06:35:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-11-07 06:35:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-07 06:35:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-11-07 06:35:29,168 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 70 [2020-11-07 06:35:29,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:29,168 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-11-07 06:35:29,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:35:29,168 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-11-07 06:35:29,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-07 06:35:29,170 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:29,170 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:29,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 06:35:29,170 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:29,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:29,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1243306807, now seen corresponding path program 8 times [2020-11-07 06:35:29,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:29,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316997218] [2020-11-07 06:35:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:29,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:29,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316997218] [2020-11-07 06:35:29,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:29,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-11-07 06:35:29,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925187373] [2020-11-07 06:35:29,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 06:35:29,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:29,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 06:35:29,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:29,452 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 20 states. [2020-11-07 06:35:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:30,817 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2020-11-07 06:35:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 06:35:30,818 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 76 [2020-11-07 06:35:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:30,819 INFO L225 Difference]: With dead ends: 100 [2020-11-07 06:35:30,819 INFO L226 Difference]: Without dead ends: 87 [2020-11-07 06:35:30,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 06:35:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-07 06:35:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-11-07 06:35:30,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-07 06:35:30,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-11-07 06:35:30,841 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 76 [2020-11-07 06:35:30,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:30,842 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-11-07 06:35:30,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 06:35:30,842 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-11-07 06:35:30,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-07 06:35:30,842 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:30,843 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:30,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 06:35:30,843 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:30,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:30,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2084853937, now seen corresponding path program 9 times [2020-11-07 06:35:30,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:30,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459181984] [2020-11-07 06:35:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:35:30,863 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:35:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:35:30,883 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:35:30,914 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 06:35:30,914 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:35:30,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 06:35:30,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:35:30 BoogieIcfgContainer [2020-11-07 06:35:30,966 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:35:30,968 INFO L168 Benchmark]: Toolchain (without parser) took 14835.73 ms. Allocated memory was 151.0 MB in the beginning and 264.2 MB in the end (delta: 113.2 MB). Free memory was 127.8 MB in the beginning and 112.2 MB in the end (delta: 15.6 MB). Peak memory consumption was 130.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:30,969 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:35:30,969 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.03 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 117.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:30,970 INFO L168 Benchmark]: Boogie Preprocessor took 41.28 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:30,971 INFO L168 Benchmark]: RCFGBuilder took 391.06 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 102.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:30,972 INFO L168 Benchmark]: TraceAbstraction took 14121.85 ms. Allocated memory was 151.0 MB in the beginning and 264.2 MB in the end (delta: 113.2 MB). Free memory was 101.9 MB in the beginning and 112.2 MB in the end (delta: -10.3 MB). Peak memory consumption was 103.7 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:30,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.03 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 117.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.28 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 391.06 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 102.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14121.85 ms. Allocated memory was 151.0 MB in the beginning and 264.2 MB in the end (delta: 113.2 MB). Free memory was 101.9 MB in the beginning and 112.2 MB in the end (delta: -10.3 MB). Peak memory consumption was 103.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; VAL [__VERIFIER_nondet_uint()=10, n=10] [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; VAL [n=0, n=10] [L24] i=1 VAL [i=1, n=0, n=10] [L24] COND TRUE i<=n VAL [i=1, n=0, n=10] [L25] COND TRUE i<10 VAL [i=1, n=10, n=0] [L26] sn = sn + (2) VAL [i=1, n=2, n=10] [L24] i++ VAL [i=2, n=2, n=10] [L24] COND TRUE i<=n VAL [i=2, n=2, n=10] [L25] COND TRUE i<10 VAL [i=2, n=2, n=10] [L26] sn = sn + (2) VAL [i=2, n=10, n=4] [L24] i++ VAL [i=3, n=4, n=10] [L24] COND TRUE i<=n VAL [i=3, n=10, n=4] [L25] COND TRUE i<10 VAL [i=3, n=10, n=4] [L26] sn = sn + (2) VAL [i=3, n=6, n=10] [L24] i++ VAL [i=4, n=6, n=10] [L24] COND TRUE i<=n VAL [i=4, n=10, n=6] [L25] COND TRUE i<10 VAL [i=4, n=6, n=10] [L26] sn = sn + (2) VAL [i=4, n=10, n=8] [L24] i++ VAL [i=5, n=10, n=8] [L24] COND TRUE i<=n VAL [i=5, n=10, n=8] [L25] COND TRUE i<10 VAL [i=5, n=10, n=8] [L26] sn = sn + (2) VAL [i=5, n=10, n=10] [L24] i++ VAL [i=6, n=10, n=10] [L24] COND TRUE i<=n VAL [i=6, n=10, n=10] [L25] COND TRUE i<10 VAL [i=6, n=10, n=10] [L26] sn = sn + (2) VAL [i=6, n=12, n=10] [L24] i++ VAL [i=7, n=10, n=12] [L24] COND TRUE i<=n VAL [i=7, n=10, n=12] [L25] COND TRUE i<10 VAL [i=7, n=12, n=10] [L26] sn = sn + (2) VAL [i=7, n=10, n=14] [L24] i++ VAL [i=8, n=14, n=10] [L24] COND TRUE i<=n VAL [i=8, n=10, n=14] [L25] COND TRUE i<10 VAL [i=8, n=10, n=14] [L26] sn = sn + (2) VAL [i=8, n=16, n=10] [L24] i++ VAL [i=9, n=10, n=16] [L24] COND TRUE i<=n VAL [i=9, n=16, n=10] [L25] COND TRUE i<10 VAL [i=9, n=16, n=10] [L26] sn = sn + (2) VAL [i=9, n=18, n=10] [L24] i++ VAL [i=10, n=18, n=10] [L24] COND TRUE i<=n VAL [i=10, n=18, n=10] [L25] COND FALSE !(i<10) VAL [i=10, n=10, n=18] [L24] i++ VAL [i=11, n=10, n=18] [L24] COND FALSE !(i<=n) VAL [i=11, n=18, n=10] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum01-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.9s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 9.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 338 SDtfs, 686 SDslu, 1245 SDs, 0 SdLazy, 1802 SolverSat, 171 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 329 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 34 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 673 NumberOfCodeBlocks, 673 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 578 ConstructedInterpolants, 0 QuantifiedInterpolants, 92044 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 154/758 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...