/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 0.2.0-7d8eed3 [2020-11-07 06:36:17,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:36:17,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:36:17,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:36:17,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:36:17,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:36:17,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:36:17,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:36:17,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:36:17,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:36:17,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:36:17,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:36:17,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:36:17,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:36:17,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:36:17,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:36:17,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:36:17,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:36:17,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:36:17,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:36:17,321 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:36:17,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:36:17,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:36:17,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:36:17,336 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:36:17,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:36:17,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:36:17,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:36:17,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:36:17,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:36:17,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:36:17,338 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:36:17,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:36:17,338 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:36:17,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:36:17,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:36:17,339 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:36:17,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:36:17,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:36:17,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:36:17,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:36:17,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:36:17,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:36:17,341 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:36:17,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:36:17,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:36:17,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:36:17,768 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:36:17,769 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:36:17,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_vardep_1.c [2020-11-07 06:36:17,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ac56dfa9/de52a71916004adc9ecea78d0b5e1405/FLAG22ba28291 [2020-11-07 06:36:18,550 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:36:18,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_vardep_1.c [2020-11-07 06:36:18,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ac56dfa9/de52a71916004adc9ecea78d0b5e1405/FLAG22ba28291 [2020-11-07 06:36:18,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ac56dfa9/de52a71916004adc9ecea78d0b5e1405 [2020-11-07 06:36:18,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:36:18,935 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:36:18,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:36:18,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:36:18,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:36:18,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:36:18" (1/1) ... [2020-11-07 06:36:18,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52946bac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:18, skipping insertion in model container [2020-11-07 06:36:18,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:36:18" (1/1) ... [2020-11-07 06:36:18,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:36:18,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:36:19,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:36:19,154 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:36:19,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:36:19,185 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:36:19,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:19 WrapperNode [2020-11-07 06:36:19,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:36:19,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:36:19,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:36:19,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:36:19,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:19" (1/1) ... [2020-11-07 06:36:19,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:19" (1/1) ... [2020-11-07 06:36:19,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:19" (1/1) ... [2020-11-07 06:36:19,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:19" (1/1) ... [2020-11-07 06:36:19,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:19" (1/1) ... [2020-11-07 06:36:19,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:19" (1/1) ... [2020-11-07 06:36:19,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:19" (1/1) ... [2020-11-07 06:36:19,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:36:19,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:36:19,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:36:19,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:36:19,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:36:19,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:36:19,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:36:19,320 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:36:19,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:36:19,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:36:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:36:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:36:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:36:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:36:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:36:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:36:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:36:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:36:19,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:36:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:36:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:36:19,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:36:19,577 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:36:19,577 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:36:19,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:36:19 BoogieIcfgContainer [2020-11-07 06:36:19,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:36:19,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:36:19,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:36:19,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:36:19,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:36:18" (1/3) ... [2020-11-07 06:36:19,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231a9937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:36:19, skipping insertion in model container [2020-11-07 06:36:19,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:36:19" (2/3) ... [2020-11-07 06:36:19,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231a9937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:36:19, skipping insertion in model container [2020-11-07 06:36:19,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:36:19" (3/3) ... [2020-11-07 06:36:19,590 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_vardep_1.c [2020-11-07 06:36:19,622 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:36:19,631 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:36:19,666 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:36:19,729 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:36:19,732 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:36:19,733 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:36:19,733 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:36:19,733 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:36:19,733 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:36:19,733 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:36:19,734 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:36:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-11-07 06:36:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-07 06:36:19,807 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:19,811 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] [2020-11-07 06:36:19,812 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:19,831 INFO L82 PathProgramCache]: Analyzing trace with hash -464977974, now seen corresponding path program 1 times [2020-11-07 06:36:19,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:19,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742902994] [2020-11-07 06:36:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:20,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:20,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742902994] [2020-11-07 06:36:20,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:36:20,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 06:36:20,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620798182] [2020-11-07 06:36:20,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 06:36:20,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:20,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 06:36:20,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:36:20,698 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 11 states. [2020-11-07 06:36:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:21,285 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-11-07 06:36:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 06:36:21,287 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-11-07 06:36:21,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:21,295 INFO L225 Difference]: With dead ends: 63 [2020-11-07 06:36:21,296 INFO L226 Difference]: Without dead ends: 38 [2020-11-07 06:36:21,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:36:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-07 06:36:21,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-11-07 06:36:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-07 06:36:21,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-11-07 06:36:21,352 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 24 [2020-11-07 06:36:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:21,353 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-11-07 06:36:21,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 06:36:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-11-07 06:36:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-07 06:36:21,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:21,355 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] [2020-11-07 06:36:21,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:36:21,355 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:21,356 INFO L82 PathProgramCache]: Analyzing trace with hash 375463958, now seen corresponding path program 1 times [2020-11-07 06:36:21,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:21,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736948544] [2020-11-07 06:36:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:21,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:21,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-07 06:36:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:36:21,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736948544] [2020-11-07 06:36:21,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:21,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:36:21,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965301786] [2020-11-07 06:36:21,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:36:21,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:21,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:36:21,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:36:21,782 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 14 states. [2020-11-07 06:36:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:22,278 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-11-07 06:36:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:36:22,279 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-11-07 06:36:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:22,279 INFO L225 Difference]: With dead ends: 36 [2020-11-07 06:36:22,280 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 06:36:22,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-11-07 06:36:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 06:36:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 06:36:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 06:36:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 06:36:22,282 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-11-07 06:36:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:22,283 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 06:36:22,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:36:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 06:36:22,283 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 06:36:22,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:36:22,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 06:36:22,902 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 6) the Hoare annotation is: true [2020-11-07 06:36:22,902 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 6) the Hoare annotation is: true [2020-11-07 06:36:22,903 INFO L269 CegarLoopResult]: At program point reach_errorFINAL(line 6) the Hoare annotation is: true [2020-11-07 06:36:22,903 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) the Hoare annotation is: true [2020-11-07 06:36:22,903 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 06:36:22,903 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 06:36:22,903 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 6) the Hoare annotation is: true [2020-11-07 06:36:22,904 INFO L262 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|)) [2020-11-07 06:36:22,904 INFO L269 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-11-07 06:36:22,905 INFO L269 CegarLoopResult]: At program point L6-1(line 6) the Hoare annotation is: true [2020-11-07 06:36:22,906 INFO L269 CegarLoopResult]: At program point L6-2(line 6) the Hoare annotation is: true [2020-11-07 06:36:22,906 INFO L269 CegarLoopResult]: At program point L6-3(line 6) the Hoare annotation is: true [2020-11-07 06:36:22,906 INFO L269 CegarLoopResult]: At program point L6-4(line 6) the Hoare annotation is: true [2020-11-07 06:36:22,906 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 06:36:22,906 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 06:36:22,906 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 06:36:22,907 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 06:36:22,908 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 06:36:22,908 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 15 29) the Hoare annotation is: true [2020-11-07 06:36:22,908 INFO L262 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))) [2020-11-07 06:36:22,909 INFO L262 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))) [2020-11-07 06:36:22,909 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 15 29) the Hoare annotation is: true [2020-11-07 06:36:22,910 INFO L262 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))) [2020-11-07 06:36:22,910 INFO L262 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))) [2020-11-07 06:36:22,911 INFO L262 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))) [2020-11-07 06:36:22,912 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= main_~i~0 0) (= main_~j~0 0)) [2020-11-07 06:36:22,912 INFO L269 CegarLoopResult]: At program point L21-2(lines 15 29) the Hoare annotation is: true [2020-11-07 06:36:22,912 INFO L262 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (= main_~i~0 0) [2020-11-07 06:36:22,917 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 13) the Hoare annotation is: true [2020-11-07 06:36:22,917 INFO L262 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 06:36:22,917 INFO L262 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 7 13) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 06:36:22,917 INFO L262 CegarLoopResult]: At program point L9(lines 9 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 06:36:22,917 INFO L262 CegarLoopResult]: At program point L10-1(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 06:36:22,918 INFO L262 CegarLoopResult]: At program point L9-2(lines 7 13) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 06:36:22,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:36:22 BoogieIcfgContainer [2020-11-07 06:36:22,945 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:36:22,953 INFO L168 Benchmark]: Toolchain (without parser) took 4016.62 ms. Allocated memory was 161.5 MB in the beginning and 197.1 MB in the end (delta: 35.7 MB). Free memory was 137.8 MB in the beginning and 126.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 99.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:36:22,955 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 161.5 MB. Free memory is still 134.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:36:22,958 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.09 ms. Allocated memory is still 161.5 MB. Free memory was 137.2 MB in the beginning and 128.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:36:22,959 INFO L168 Benchmark]: Boogie Preprocessor took 33.24 ms. Allocated memory is still 161.5 MB. Free memory was 128.2 MB in the beginning and 126.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:36:22,960 INFO L168 Benchmark]: RCFGBuilder took 358.52 ms. Allocated memory is still 161.5 MB. Free memory was 126.7 MB in the beginning and 113.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-07 06:36:22,961 INFO L168 Benchmark]: TraceAbstraction took 3364.22 ms. Allocated memory was 161.5 MB in the beginning and 197.1 MB in the end (delta: 35.7 MB). Free memory was 113.5 MB in the beginning and 126.8 MB in the end (delta: -13.3 MB). Peak memory consumption was 75.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:36:22,964 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 161.5 MB. Free memory is still 134.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 249.09 ms. Allocated memory is still 161.5 MB. Free memory was 137.2 MB in the beginning and 128.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.24 ms. Allocated memory is still 161.5 MB. Free memory was 128.2 MB in the beginning and 126.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 358.52 ms. Allocated memory is still 161.5 MB. Free memory was 126.7 MB in the beginning and 113.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3364.22 ms. Allocated memory was 161.5 MB in the beginning and 197.1 MB in the end (delta: 35.7 MB). Free memory was 113.5 MB in the beginning and 126.8 MB in the end (delta: -13.3 MB). Peak memory consumption was 75.0 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: 2.5s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 56 SDslu, 231 SDs, 0 SdLazy, 214 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.2s 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, 0.2s HoareSimplificationTime, 34 FomulaSimplificationsInter, 615 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s 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...