/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/ldv-regression/test_while_int.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 05:17:33,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:17:33,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:17:33,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 05:17:33,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:17:33,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:17:33,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:17:33,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:17:33,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:17:33,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:17:33,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:17:33,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:17:33,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:17:33,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:17:33,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:17:33,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:17:33,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 05:17:33,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:17:33,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:17:33,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:17:33,374 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 05:17:33,398 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:17:33,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:17:33,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:17:33,403 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:17:33,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:17:33,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:17:33,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:17:33,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:17:33,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:17:33,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:17:33,406 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:17:33,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:17:33,407 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:17:33,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:17:33,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:17:33,409 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:17:33,409 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:17:33,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:17:33,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:17:33,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:17:33,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:17:33,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:17:33,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:17:33,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:17:33,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:17:33,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:17:33,925 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:17:33,926 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:17:33,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2020-11-07 05:17:34,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec93474c1/e51661d6de4848eaa9343be7a0b0169d/FLAG55fc578a6 [2020-11-07 05:17:34,703 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:17:34,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2020-11-07 05:17:34,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec93474c1/e51661d6de4848eaa9343be7a0b0169d/FLAG55fc578a6 [2020-11-07 05:17:35,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec93474c1/e51661d6de4848eaa9343be7a0b0169d [2020-11-07 05:17:35,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:17:35,085 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:17:35,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:17:35,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:17:35,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:17:35,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:17:35" (1/1) ... [2020-11-07 05:17:35,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e2f24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:35, skipping insertion in model container [2020-11-07 05:17:35,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:17:35" (1/1) ... [2020-11-07 05:17:35,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:17:35,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:17:35,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:17:35,308 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:17:35,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:17:35,344 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:17:35,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:35 WrapperNode [2020-11-07 05:17:35,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:17:35,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:17:35,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:17:35,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:17:35,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:35" (1/1) ... [2020-11-07 05:17:35,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:35" (1/1) ... [2020-11-07 05:17:35,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:35" (1/1) ... [2020-11-07 05:17:35,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:35" (1/1) ... [2020-11-07 05:17:35,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:35" (1/1) ... [2020-11-07 05:17:35,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:35" (1/1) ... [2020-11-07 05:17:35,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:35" (1/1) ... [2020-11-07 05:17:35,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:17:35,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:17:35,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:17:35,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:17:35,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:35" (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 05:17:35,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:17:35,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:17:35,503 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:17:35,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-11-07 05:17:35,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:17:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:17:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:17:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:17:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:17:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-11-07 05:17:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:17:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:17:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:17:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:17:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:17:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:17:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:17:35,957 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:17:35,957 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 05:17:35,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:17:35 BoogieIcfgContainer [2020-11-07 05:17:35,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:17:35,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:17:35,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:17:35,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:17:35,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:17:35" (1/3) ... [2020-11-07 05:17:35,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399057fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:17:35, skipping insertion in model container [2020-11-07 05:17:35,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:35" (2/3) ... [2020-11-07 05:17:35,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399057fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:17:35, skipping insertion in model container [2020-11-07 05:17:35,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:17:35" (3/3) ... [2020-11-07 05:17:35,977 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.c_1.i [2020-11-07 05:17:35,998 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:17:36,002 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:17:36,020 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:17:36,065 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:17:36,066 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:17:36,066 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:17:36,066 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:17:36,066 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:17:36,066 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:17:36,067 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:17:36,067 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:17:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-07 05:17:36,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-07 05:17:36,110 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:36,111 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] [2020-11-07 05:17:36,112 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:36,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:36,126 INFO L82 PathProgramCache]: Analyzing trace with hash -289981893, now seen corresponding path program 1 times [2020-11-07 05:17:36,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:36,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316725391] [2020-11-07 05:17:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:36,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:17:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:36,657 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 05:17:36,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316725391] [2020-11-07 05:17:36,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:17:36,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 05:17:36,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364602309] [2020-11-07 05:17:36,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 05:17:36,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:17:36,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 05:17:36,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 05:17:36,689 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 6 states. [2020-11-07 05:17:36,916 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-11-07 05:17:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:17:37,075 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-11-07 05:17:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 05:17:37,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-07 05:17:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:17:37,086 INFO L225 Difference]: With dead ends: 54 [2020-11-07 05:17:37,087 INFO L226 Difference]: Without dead ends: 30 [2020-11-07 05:17:37,091 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 [2020-11-07 05:17:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-07 05:17:37,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-11-07 05:17:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-07 05:17:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-07 05:17:37,149 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-11-07 05:17:37,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:17:37,150 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-07 05:17:37,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 05:17:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-07 05:17:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-07 05:17:37,152 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:37,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:17:37,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:17:37,153 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:37,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:37,154 INFO L82 PathProgramCache]: Analyzing trace with hash 222212590, now seen corresponding path program 1 times [2020-11-07 05:17:37,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:37,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379092374] [2020-11-07 05:17:37,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:37,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:17:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:17:37,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379092374] [2020-11-07 05:17:37,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:17:37,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 05:17:37,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714230655] [2020-11-07 05:17:37,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 05:17:37,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:17:37,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 05:17:37,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:17:37,302 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-11-07 05:17:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:17:37,751 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-11-07 05:17:37,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 05:17:37,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-11-07 05:17:37,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:17:37,754 INFO L225 Difference]: With dead ends: 39 [2020-11-07 05:17:37,754 INFO L226 Difference]: Without dead ends: 35 [2020-11-07 05:17:37,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-11-07 05:17:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-07 05:17:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-11-07 05:17:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-07 05:17:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-11-07 05:17:37,770 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-11-07 05:17:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:17:37,771 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-11-07 05:17:37,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 05:17:37,771 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-11-07 05:17:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-07 05:17:37,772 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:37,773 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:17:37,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:17:37,773 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:37,774 INFO L82 PathProgramCache]: Analyzing trace with hash 758977051, now seen corresponding path program 2 times [2020-11-07 05:17:37,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:37,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207639557] [2020-11-07 05:17:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:17:37,799 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:17:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:17:37,820 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:17:37,851 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 05:17:37,851 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 05:17:37,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 05:17:37,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:17:37 BoogieIcfgContainer [2020-11-07 05:17:37,914 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:17:37,922 INFO L168 Benchmark]: Toolchain (without parser) took 2836.21 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 138.7 MB in the beginning and 138.8 MB in the end (delta: -153.7 kB). Peak memory consumption was 30.9 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:37,928 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 154.1 MB. Free memory was 128.3 MB in the beginning and 128.2 MB in the end (delta: 135.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:17:37,930 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.66 ms. Allocated memory is still 154.1 MB. Free memory was 138.0 MB in the beginning and 129.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:37,931 INFO L168 Benchmark]: Boogie Preprocessor took 35.57 ms. Allocated memory is still 154.1 MB. Free memory was 129.1 MB in the beginning and 127.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:37,932 INFO L168 Benchmark]: RCFGBuilder took 577.73 ms. Allocated memory is still 154.1 MB. Free memory was 127.8 MB in the beginning and 126.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:37,933 INFO L168 Benchmark]: TraceAbstraction took 1949.68 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 126.1 MB in the beginning and 138.8 MB in the end (delta: -12.7 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:37,937 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 154.1 MB. Free memory was 128.3 MB in the beginning and 128.2 MB in the end (delta: 135.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.66 ms. Allocated memory is still 154.1 MB. Free memory was 138.0 MB in the beginning and 129.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.57 ms. Allocated memory is still 154.1 MB. Free memory was 129.1 MB in the beginning and 127.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 577.73 ms. Allocated memory is still 154.1 MB. Free memory was 127.8 MB in the beginning and 126.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1949.68 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 126.1 MB in the beginning and 138.8 MB in the end (delta: -12.7 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0; VAL [i=0] [L15] COND TRUE i<5 VAL [i=0] [L16] i++ VAL [i=1] [L18] (i!=3) ? (0) : __blast_assert () VAL [i=1] [L15] COND TRUE i<5 VAL [i=1] [L16] i++ VAL [i=2] [L18] (i!=3) ? (0) : __blast_assert () VAL [i=2] [L15] COND TRUE i<5 VAL [i=2] [L16] i++ VAL [i=3] [L18] (i!=3) ? (0) : __blast_assert () VAL [i=3] [L18] CALL __blast_assert () [L8] CALL reach_error() [L3] __assert_fail("0", "test_while_int.c_1.i", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 51 SDslu, 109 SDs, 0 SdLazy, 86 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, 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, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 3075 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...