/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/loop-acceleration/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:25:23,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:25:23,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:25:23,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 02:25:23,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 02:25:23,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 02:25:23,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 02:25:23,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 02:25:23,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 02:25:23,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 02:25:23,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 02:25:23,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 02:25:23,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:25:23,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:25:23,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:25:23,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:25:23,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:25:23,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:25:23,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:25:23,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:25:23,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:25:23,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:25:23,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:25:23,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:25:23,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:25:23,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:25:23,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:25:23,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:25:23,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:25:23,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:25:23,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:25:23,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:25:23,497 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:25:23,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:25:23,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:25:23,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:25:23,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:25:23,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:25:23,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:25:23,499 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:25:23,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:25:23,499 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:25:23,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:25:23,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:25:23,500 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:25:23,500 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:25:23,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:25:23,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:25:23,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:25:23,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:25:23,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:25:23,502 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:25:23,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:25:23,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:25:23,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:25:23,996 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:25:23,997 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:25:23,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-10-24 02:25:24,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0edcfc39b/f2d04e9a76994b3a8f866b137b57649d/FLAG28cb3548b [2020-10-24 02:25:24,751 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:25:24,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-10-24 02:25:24,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0edcfc39b/f2d04e9a76994b3a8f866b137b57649d/FLAG28cb3548b [2020-10-24 02:25:25,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0edcfc39b/f2d04e9a76994b3a8f866b137b57649d [2020-10-24 02:25:25,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:25:25,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:25:25,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:25,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:25:25,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:25:25,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:25" (1/1) ... [2020-10-24 02:25:25,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7570d9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:25, skipping insertion in model container [2020-10-24 02:25:25,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:25" (1/1) ... [2020-10-24 02:25:25,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:25:25,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:25:25,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:25,307 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:25:25,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:25,340 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:25:25,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:25 WrapperNode [2020-10-24 02:25:25,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:25,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:25:25,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:25:25,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:25:25,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:25" (1/1) ... [2020-10-24 02:25:25,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:25" (1/1) ... [2020-10-24 02:25:25,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:25" (1/1) ... [2020-10-24 02:25:25,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:25" (1/1) ... [2020-10-24 02:25:25,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:25" (1/1) ... [2020-10-24 02:25:25,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:25" (1/1) ... [2020-10-24 02:25:25,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:25" (1/1) ... [2020-10-24 02:25:25,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:25:25,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:25:25,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:25:25,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:25:25,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:25:25,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:25:25,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:25:25,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:25:25,453 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:25:25,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:25:25,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:25:25,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:25:25,453 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:25:25,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:25:25,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:25:25,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:25:25,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:25:25,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:25:25,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:25:25,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:25:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:25:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:25:25,709 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:25:25,710 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:25:25,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:25 BoogieIcfgContainer [2020-10-24 02:25:25,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:25:25,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:25:25,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:25:25,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:25:25,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:25:25" (1/3) ... [2020-10-24 02:25:25,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b89705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:25, skipping insertion in model container [2020-10-24 02:25:25,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:25" (2/3) ... [2020-10-24 02:25:25,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b89705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:25, skipping insertion in model container [2020-10-24 02:25:25,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:25" (3/3) ... [2020-10-24 02:25:25,725 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-10-24 02:25:25,742 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:25:25,748 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:25:25,767 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:25:25,821 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:25:25,824 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:25:25,824 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:25:25,825 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:25:25,825 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:25:25,825 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:25:25,825 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:25:25,825 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:25:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-24 02:25:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-24 02:25:25,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:25,889 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] [2020-10-24 02:25:25,890 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:25,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:25,907 INFO L82 PathProgramCache]: Analyzing trace with hash -772490682, now seen corresponding path program 1 times [2020-10-24 02:25:25,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:25,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509034203] [2020-10-24 02:25:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:26,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:26,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509034203] [2020-10-24 02:25:26,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:25:26,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:25:26,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731964468] [2020-10-24 02:25:26,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:25:26,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:26,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:25:26,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:25:26,464 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-24 02:25:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:26,684 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-24 02:25:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:25:26,686 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-24 02:25:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:26,694 INFO L225 Difference]: With dead ends: 49 [2020-10-24 02:25:26,694 INFO L226 Difference]: Without dead ends: 28 [2020-10-24 02:25:26,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:25:26,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-24 02:25:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-24 02:25:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-24 02:25:26,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-24 02:25:26,751 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 20 [2020-10-24 02:25:26,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:26,751 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-24 02:25:26,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:25:26,752 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-24 02:25:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-24 02:25:26,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:26,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:26,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:25:26,754 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash 515607529, now seen corresponding path program 1 times [2020-10-24 02:25:26,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:26,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761493224] [2020-10-24 02:25:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:27,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:27,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761493224] [2020-10-24 02:25:27,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:27,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:25:27,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288626855] [2020-10-24 02:25:27,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:25:27,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:25:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:25:27,050 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 6 states. [2020-10-24 02:25:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:27,437 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-24 02:25:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:25:27,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-24 02:25:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:27,439 INFO L225 Difference]: With dead ends: 39 [2020-10-24 02:25:27,439 INFO L226 Difference]: Without dead ends: 33 [2020-10-24 02:25:27,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:25:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-24 02:25:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-24 02:25:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 02:25:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-24 02:25:27,455 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 25 [2020-10-24 02:25:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:27,455 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-24 02:25:27,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:25:27,456 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-24 02:25:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-24 02:25:27,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:27,457 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:27,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:25:27,458 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:27,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:27,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1732949978, now seen corresponding path program 2 times [2020-10-24 02:25:27,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:27,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987746927] [2020-10-24 02:25:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:27,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:27,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987746927] [2020-10-24 02:25:27,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:27,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:25:27,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114389526] [2020-10-24 02:25:27,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:25:27,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:27,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:25:27,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:25:27,646 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 8 states. [2020-10-24 02:25:28,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:28,020 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-24 02:25:28,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:25:28,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-24 02:25:28,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:28,022 INFO L225 Difference]: With dead ends: 44 [2020-10-24 02:25:28,022 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 02:25:28,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:25:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 02:25:28,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-24 02:25:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-24 02:25:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-24 02:25:28,036 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 30 [2020-10-24 02:25:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:28,037 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-24 02:25:28,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:25:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-24 02:25:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-24 02:25:28,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:28,038 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 02:25:28,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:25:28,039 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:28,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1450661367, now seen corresponding path program 3 times [2020-10-24 02:25:28,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:28,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613672987] [2020-10-24 02:25:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:28,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:28,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613672987] [2020-10-24 02:25:28,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:28,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:25:28,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5775906] [2020-10-24 02:25:28,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:25:28,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:28,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:25:28,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:25:28,221 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 10 states. [2020-10-24 02:25:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:28,788 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-24 02:25:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:25:28,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-24 02:25:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:28,791 INFO L225 Difference]: With dead ends: 49 [2020-10-24 02:25:28,791 INFO L226 Difference]: Without dead ends: 43 [2020-10-24 02:25:28,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:25:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-24 02:25:28,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-24 02:25:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-24 02:25:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-24 02:25:28,805 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 35 [2020-10-24 02:25:28,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:28,806 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-24 02:25:28,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:25:28,806 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-24 02:25:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-24 02:25:28,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:28,808 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:28,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:25:28,808 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:28,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:28,809 INFO L82 PathProgramCache]: Analyzing trace with hash 772144646, now seen corresponding path program 4 times [2020-10-24 02:25:28,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:28,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535586702] [2020-10-24 02:25:28,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:29,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:29,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535586702] [2020-10-24 02:25:29,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:29,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:25:29,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338548877] [2020-10-24 02:25:29,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:25:29,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:29,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:25:29,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:25:29,067 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 12 states. [2020-10-24 02:25:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:29,882 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-24 02:25:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:25:29,889 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-24 02:25:29,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:29,890 INFO L225 Difference]: With dead ends: 54 [2020-10-24 02:25:29,891 INFO L226 Difference]: Without dead ends: 48 [2020-10-24 02:25:29,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:25:29,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-24 02:25:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-24 02:25:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-24 02:25:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-24 02:25:29,914 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 40 [2020-10-24 02:25:29,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:29,914 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-24 02:25:29,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:25:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-24 02:25:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-24 02:25:29,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:29,916 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:29,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:25:29,916 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:29,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1100914729, now seen corresponding path program 5 times [2020-10-24 02:25:29,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:29,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693072001] [2020-10-24 02:25:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:30,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:30,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693072001] [2020-10-24 02:25:30,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:30,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:25:30,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160943689] [2020-10-24 02:25:30,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:25:30,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:30,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:25:30,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:25:30,248 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 14 states. [2020-10-24 02:25:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:31,406 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-24 02:25:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:25:31,411 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-24 02:25:31,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:31,413 INFO L225 Difference]: With dead ends: 59 [2020-10-24 02:25:31,413 INFO L226 Difference]: Without dead ends: 53 [2020-10-24 02:25:31,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:25:31,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-24 02:25:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-24 02:25:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-24 02:25:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-24 02:25:31,430 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 45 [2020-10-24 02:25:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:31,431 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-24 02:25:31,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:25:31,431 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-24 02:25:31,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-24 02:25:31,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:31,433 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:31,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:25:31,433 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:31,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:31,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1507122150, now seen corresponding path program 6 times [2020-10-24 02:25:31,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:31,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343708594] [2020-10-24 02:25:31,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:31,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:31,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343708594] [2020-10-24 02:25:31,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:31,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-24 02:25:31,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783154538] [2020-10-24 02:25:31,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-24 02:25:31,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:31,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-24 02:25:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:25:31,931 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 19 states. [2020-10-24 02:25:33,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:33,535 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-10-24 02:25:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 02:25:33,535 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2020-10-24 02:25:33,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:33,536 INFO L225 Difference]: With dead ends: 59 [2020-10-24 02:25:33,537 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 02:25:33,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:25:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 02:25:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 02:25:33,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 02:25:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 02:25:33,540 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-10-24 02:25:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:33,540 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 02:25:33,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-24 02:25:33,541 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 02:25:33,541 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 02:25:33,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:25:33,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 02:25:34,152 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2020-10-24 02:25:34,386 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-10-24 02:25:34,689 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-10-24 02:25:34,937 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-24 02:25:35,104 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-10-24 02:25:35,144 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 3) the Hoare annotation is: true [2020-10-24 02:25:35,144 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-24 02:25:35,144 INFO L277 CegarLoopResult]: At program point reach_errorFINAL(line 3) the Hoare annotation is: true [2020-10-24 02:25:35,145 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) the Hoare annotation is: true [2020-10-24 02:25:35,145 INFO L277 CegarLoopResult]: At program point L3-2(line 3) the Hoare annotation is: true [2020-10-24 02:25:35,145 INFO L277 CegarLoopResult]: At program point L3-3(line 3) the Hoare annotation is: true [2020-10-24 02:25:35,145 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:25:35,145 INFO L277 CegarLoopResult]: At program point L3-4(line 3) the Hoare annotation is: true [2020-10-24 02:25:35,145 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-24 02:25:35,146 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2020-10-24 02:25:35,146 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-24 02:25:35,146 INFO L277 CegarLoopResult]: At program point L3(line 3) the Hoare annotation is: true [2020-10-24 02:25:35,146 INFO L277 CegarLoopResult]: At program point L3-1(line 3) the Hoare annotation is: true [2020-10-24 02:25:35,146 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:25:35,146 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:25:35,147 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:25:35,147 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-24 02:25:35,147 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-24 02:25:35,147 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 12 22) the Hoare annotation is: true [2020-10-24 02:25:35,147 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 12 22) the Hoare annotation is: true [2020-10-24 02:25:35,148 INFO L270 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (and (<= 4 main_~x~0) (<= main_~x~0 4)) (and (<= 2 main_~x~0) (<= main_~x~0 2)) (and (<= 1 main_~x~0) (<= main_~x~0 1)) (let ((.cse1 (div main_~x~0 4294967296))) (let ((.cse0 (* 4294967296 .cse1))) (and (< (+ .cse0 5) main_~x~0) (<= main_~x~0 (+ .cse0 6)) (<= 0 .cse1)))) (and (<= main_~x~0 3) (<= 3 main_~x~0)) (and (<= main_~x~0 5) (<= 5 main_~x~0))) [2020-10-24 02:25:35,148 INFO L270 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (or (and (<= 4 main_~x~0) (<= main_~x~0 4)) (and (<= 2 main_~x~0) (<= main_~x~0 2)) (and (<= 1 main_~x~0) (<= main_~x~0 1)) (and (<= main_~x~0 3) (<= 3 main_~x~0)) (and (<= main_~x~0 5) (<= 5 main_~x~0)) (= main_~x~0 0)) [2020-10-24 02:25:35,148 INFO L270 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: (or (and (<= |main_#t~post7| 1) (<= 1 main_~x~0) (<= 1 |main_#t~post7|) (<= main_~x~0 1)) (and (<= main_~x~0 5) (<= |main_#t~post7| 5) (<= 5 main_~x~0) (<= 5 |main_#t~post7|)) (and (<= 2 main_~x~0) (<= main_~x~0 2) (<= 2 |main_#t~post7|) (<= |main_#t~post7| 2)) (and (<= |main_#t~post7| 3) (<= main_~x~0 3) (<= 3 |main_#t~post7|) (<= 3 main_~x~0)) (and (<= 4 |main_#t~post7|) (<= 4 main_~x~0) (<= |main_#t~post7| 4) (<= main_~x~0 4)) (and (= |main_#t~post7| 0) (= main_~x~0 0))) [2020-10-24 02:25:35,149 INFO L270 CegarLoopResult]: At program point L17-2(line 17) the Hoare annotation is: (or (and (<= |main_#t~post7| 1) (<= 2 main_~x~0) (<= 1 |main_#t~post7|) (<= main_~x~0 2)) (and (<= main_~x~0 3) (<= 3 main_~x~0) (<= 2 |main_#t~post7|) (<= |main_#t~post7| 2)) (and (<= 1 main_~x~0) (= |main_#t~post7| 0) (<= main_~x~0 1)) (and (<= 4 main_~x~0) (<= |main_#t~post7| 3) (<= 3 |main_#t~post7|) (<= main_~x~0 4)) (let ((.cse1 (div main_~x~0 4294967296))) (let ((.cse0 (* 4294967296 .cse1))) (and (< (+ .cse0 5) main_~x~0) (<= |main_#t~post7| 5) (<= main_~x~0 (+ .cse0 6)) (<= 5 |main_#t~post7|) (<= 0 .cse1)))) (and (<= 4 |main_#t~post7|) (<= |main_#t~post7| 4) (<= main_~x~0 5) (<= 5 main_~x~0))) [2020-10-24 02:25:35,149 INFO L270 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= main_~x~0 0) [2020-10-24 02:25:35,149 INFO L270 CegarLoopResult]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse1 (div main_~x~0 4294967296))) (or (let ((.cse0 (* 4294967296 .cse1))) (and (< (+ .cse0 5) main_~x~0) (<= main_~x~0 (+ .cse0 6)) (<= 0 .cse1))) (and (<= main_~x~0 5) (<= 5 main_~x~0)) (and (< 0 (+ .cse1 1)) (<= main_~x~0 4)))) [2020-10-24 02:25:35,149 INFO L270 CegarLoopResult]: At program point L16-3(lines 16 19) the Hoare annotation is: (let ((.cse1 (div main_~x~0 4294967296))) (let ((.cse0 (* 4294967296 .cse1))) (and (< (+ .cse0 5) main_~x~0) (<= main_~x~0 (+ .cse0 6)) (<= 0 .cse1)))) [2020-10-24 02:25:35,149 INFO L277 CegarLoopResult]: At program point mainFINAL(lines 12 22) the Hoare annotation is: true [2020-10-24 02:25:35,150 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-10-24 02:25:35,150 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2020-10-24 02:25:35,150 INFO L270 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:25:35,150 INFO L270 CegarLoopResult]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:25:35,150 INFO L270 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:25:35,150 INFO L277 CegarLoopResult]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2020-10-24 02:25:35,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:25:35 BoogieIcfgContainer [2020-10-24 02:25:35,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:25:35,174 INFO L168 Benchmark]: Toolchain (without parser) took 10090.52 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.9 MB in the beginning and 160.1 MB in the end (delta: -33.2 MB). Peak memory consumption was 119.7 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:35,175 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 126.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:25:35,176 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.09 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:35,177 INFO L168 Benchmark]: Boogie Preprocessor took 34.46 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:35,178 INFO L168 Benchmark]: RCFGBuilder took 336.16 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 102.6 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:35,179 INFO L168 Benchmark]: TraceAbstraction took 9452.84 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 102.2 MB in the beginning and 160.1 MB in the end (delta: -57.9 MB). Peak memory consumption was 94.5 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:35,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 126.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 255.09 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.46 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 336.16 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 102.6 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9452.84 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 102.2 MB in the beginning and 160.1 MB in the end (delta: -57.9 MB). Peak memory consumption was 94.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 16]: Loop Invariant Derived loop invariant: (((4294967296 * (x / 4294967296) + 5 < x && x <= 4294967296 * (x / 4294967296) + 6) && 0 <= x / 4294967296) || (x <= 5 && 5 <= x)) || (0 < x / 4294967296 + 1 && x <= 4) - ProcedureContractResult [Line: 3]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.7s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 243 SDslu, 666 SDs, 0 SdLazy, 1230 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 152 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 12 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 100 PreInvPairs, 150 NumberOfFragments, 403 HoareAnnotationTreeSize, 100 FomulaSimplifications, 16638 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 34 FomulaSimplificationsInter, 1349 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 245 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 238 ConstructedInterpolants, 0 QuantifiedInterpolants, 45683 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/196 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 correct! Received shutdown request...