/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-crafted/simple_vardep_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:25:32,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:25:32,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:25:32,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:25:32,322 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 02:25:32,342 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:25:32,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:25:32,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:25:32,347 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:25:32,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:25:32,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:25:32,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:25:32,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:25:32,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:25:32,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:25:32,349 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:25:32,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:25:32,349 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:25:32,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:25:32,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:25:32,350 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:25:32,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:25:32,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:25:32,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:25:32,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:25:32,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:25:32,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:25:32,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:25:32,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:25:32,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:25:32,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:25:32,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:25:32,825 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:25:32,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_vardep_1.c [2020-10-24 02:25:32,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff5c9fcd4/712d2105bbb34006b75c7f1de59dcce0/FLAGc0baaa322 [2020-10-24 02:25:33,577 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:25:33,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_vardep_1.c [2020-10-24 02:25:33,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff5c9fcd4/712d2105bbb34006b75c7f1de59dcce0/FLAGc0baaa322 [2020-10-24 02:25:33,907 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff5c9fcd4/712d2105bbb34006b75c7f1de59dcce0 [2020-10-24 02:25:33,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:25:33,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:25:33,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:33,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:25:33,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:25:33,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:33" (1/1) ... [2020-10-24 02:25:33,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@761faaa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:33, skipping insertion in model container [2020-10-24 02:25:33,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:33" (1/1) ... [2020-10-24 02:25:33,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:25:33,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:25:34,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:34,121 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:25:34,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:34,154 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:25:34,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:34 WrapperNode [2020-10-24 02:25:34,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:34,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:25:34,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:25:34,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:25:34,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:34" (1/1) ... [2020-10-24 02:25:34,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:34" (1/1) ... [2020-10-24 02:25:34,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:34" (1/1) ... [2020-10-24 02:25:34,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:34" (1/1) ... [2020-10-24 02:25:34,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:34" (1/1) ... [2020-10-24 02:25:34,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:34" (1/1) ... [2020-10-24 02:25:34,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:34" (1/1) ... [2020-10-24 02:25:34,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:25:34,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:25:34,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:25:34,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:25:34,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:34" (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 02:25:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:25:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:25:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:25:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:25:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:25:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:25:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:25:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:25:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:25:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:25:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:25:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:25:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:25:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:25:34,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:25:34,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:25:34,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:25:34,625 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:25:34,626 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:25:34,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:34 BoogieIcfgContainer [2020-10-24 02:25:34,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:25:34,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:25:34,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:25:34,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:25:34,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:25:33" (1/3) ... [2020-10-24 02:25:34,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee41167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:34, skipping insertion in model container [2020-10-24 02:25:34,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:34" (2/3) ... [2020-10-24 02:25:34,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee41167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:34, skipping insertion in model container [2020-10-24 02:25:34,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:34" (3/3) ... [2020-10-24 02:25:34,637 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_vardep_1.c [2020-10-24 02:25:34,650 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:25:34,655 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:25:34,669 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:25:34,695 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:25:34,696 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:25:34,696 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:25:34,696 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:25:34,696 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:25:34,696 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:25:34,697 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:25:34,697 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:25:34,738 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-24 02:25:34,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-24 02:25:34,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:34,748 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] [2020-10-24 02:25:34,749 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:34,756 INFO L82 PathProgramCache]: Analyzing trace with hash -464977974, now seen corresponding path program 1 times [2020-10-24 02:25:34,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:34,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478646210] [2020-10-24 02:25:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:35,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:35,497 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 02:25:35,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478646210] [2020-10-24 02:25:35,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:25:35,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-24 02:25:35,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222311090] [2020-10-24 02:25:35,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:25:35,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:35,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:25:35,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:25:35,524 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 11 states. [2020-10-24 02:25:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:36,521 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-10-24 02:25:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 02:25:36,523 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-24 02:25:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:36,531 INFO L225 Difference]: With dead ends: 63 [2020-10-24 02:25:36,532 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 02:25:36,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:25:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 02:25:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-24 02:25:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-24 02:25:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-24 02:25:36,586 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 24 [2020-10-24 02:25:36,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:36,586 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-24 02:25:36,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:25:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-24 02:25:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-24 02:25:36,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:36,588 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] [2020-10-24 02:25:36,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:25:36,589 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:36,590 INFO L82 PathProgramCache]: Analyzing trace with hash 375463958, now seen corresponding path program 1 times [2020-10-24 02:25:36,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:36,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667628611] [2020-10-24 02:25:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:37,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:37,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-24 02:25:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:37,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667628611] [2020-10-24 02:25:37,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:37,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:25:37,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763467069] [2020-10-24 02:25:37,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:25:37,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:37,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:25:37,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:25:37,081 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 14 states. [2020-10-24 02:25:37,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:37,677 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-24 02:25:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:25:37,678 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-24 02:25:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:37,679 INFO L225 Difference]: With dead ends: 36 [2020-10-24 02:25:37,679 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 02:25:37,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-24 02:25:37,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 02:25:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 02:25:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 02:25:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 02:25:37,682 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-10-24 02:25:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:37,682 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 02:25:37,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:25:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 02:25:37,682 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 02:25:37,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:25:37,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 02:25:38,150 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 6) the Hoare annotation is: true [2020-10-24 02:25:38,150 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 6) the Hoare annotation is: true [2020-10-24 02:25:38,150 INFO L277 CegarLoopResult]: At program point reach_errorFINAL(line 6) the Hoare annotation is: true [2020-10-24 02:25:38,150 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) the Hoare annotation is: true [2020-10-24 02:25:38,151 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:25:38,151 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-24 02:25:38,151 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 6) the Hoare annotation is: true [2020-10-24 02:25:38,151 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 02:25:38,151 INFO L277 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-10-24 02:25:38,151 INFO L277 CegarLoopResult]: At program point L6-1(line 6) the Hoare annotation is: true [2020-10-24 02:25:38,151 INFO L277 CegarLoopResult]: At program point L6-2(line 6) the Hoare annotation is: true [2020-10-24 02:25:38,152 INFO L277 CegarLoopResult]: At program point L6-3(line 6) the Hoare annotation is: true [2020-10-24 02:25:38,152 INFO L277 CegarLoopResult]: At program point L6-4(line 6) the Hoare annotation is: true [2020-10-24 02:25:38,152 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:25:38,154 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:25:38,154 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:25:38,154 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-24 02:25:38,155 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-24 02:25:38,155 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 15 29) the Hoare annotation is: true [2020-10-24 02:25:38,155 INFO L270 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 main_~j~0))) (and (<= .cse0 main_~k~0) (<= main_~k~0 .cse0))) [2020-10-24 02:25:38,155 INFO L270 CegarLoopResult]: At program point L26-1(lines 21 27) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 main_~j~0))) (and (<= .cse0 main_~k~0) (<= main_~k~0 .cse0))) [2020-10-24 02:25:38,155 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 15 29) the Hoare annotation is: true [2020-10-24 02:25:38,160 INFO L270 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: (let ((.cse1 (+ main_~k~0 3)) (.cse0 (+ main_~i~0 main_~j~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-24 02:25:38,160 INFO L270 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse1 (+ main_~i~0 main_~j~0)) (.cse0 (+ main_~k~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-24 02:25:38,160 INFO L270 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 main_~j~0))) (and (<= .cse0 main_~k~0) (<= main_~k~0 .cse0))) [2020-10-24 02:25:38,160 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= main_~i~0 0) (= main_~j~0 0)) [2020-10-24 02:25:38,160 INFO L277 CegarLoopResult]: At program point L21-2(lines 15 29) the Hoare annotation is: true [2020-10-24 02:25:38,161 INFO L270 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (= main_~i~0 0) [2020-10-24 02:25:38,161 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 13) the Hoare annotation is: true [2020-10-24 02:25:38,161 INFO L270 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:25:38,163 INFO L270 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 7 13) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:25:38,163 INFO L270 CegarLoopResult]: At program point L9(lines 9 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:25:38,163 INFO L270 CegarLoopResult]: At program point L10-1(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:25:38,164 INFO L270 CegarLoopResult]: At program point L9-2(lines 7 13) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:25:38,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:25:38 BoogieIcfgContainer [2020-10-24 02:25:38,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:25:38,187 INFO L168 Benchmark]: Toolchain (without parser) took 4273.46 ms. Allocated memory was 155.2 MB in the beginning and 188.7 MB in the end (delta: 33.6 MB). Free memory was 130.9 MB in the beginning and 145.2 MB in the end (delta: -14.3 MB). Peak memory consumption was 102.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:38,188 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 155.2 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:25:38,189 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.33 ms. Allocated memory is still 155.2 MB. Free memory was 130.4 MB in the beginning and 121.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:38,190 INFO L168 Benchmark]: Boogie Preprocessor took 34.54 ms. Allocated memory is still 155.2 MB. Free memory was 121.1 MB in the beginning and 119.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:38,191 INFO L168 Benchmark]: RCFGBuilder took 436.28 ms. Allocated memory is still 155.2 MB. Free memory was 119.7 MB in the beginning and 106.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:38,193 INFO L168 Benchmark]: TraceAbstraction took 3554.38 ms. Allocated memory was 155.2 MB in the beginning and 188.7 MB in the end (delta: 33.6 MB). Free memory was 106.6 MB in the beginning and 145.2 MB in the end (delta: -38.7 MB). Peak memory consumption was 78.2 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:38,198 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 155.2 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 234.33 ms. Allocated memory is still 155.2 MB. Free memory was 130.4 MB in the beginning and 121.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.54 ms. Allocated memory is still 155.2 MB. Free memory was 121.1 MB in the beginning and 119.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 436.28 ms. Allocated memory is still 155.2 MB. Free memory was 119.7 MB in the beginning and 106.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3554.38 ms. Allocated memory was 155.2 MB in the beginning and 188.7 MB in the end (delta: 33.6 MB). Free memory was 106.6 MB in the beginning and 145.2 MB in the end (delta: -38.7 MB). Peak memory consumption was 78.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 21]: Loop Invariant Derived loop invariant: i + j <= k && k <= i + j - ProcedureContractResult [Line: 6]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 15]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 7]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.9s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 56 SDslu, 231 SDs, 0 SdLazy, 214 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 50 PreInvPairs, 70 NumberOfFragments, 155 HoareAnnotationTreeSize, 50 FomulaSimplifications, 437 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 34 FomulaSimplificationsInter, 615 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 10504 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/7 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...