/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:46:19,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:46:19,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:46:19,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:46:19,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:46:19,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:46:19,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:46:19,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:46:19,629 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:46:19,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:46:19,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:46:19,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:46:19,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:46:19,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:46:19,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:46:19,630 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:46:19,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:46:19,631 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:46:19,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:46:19,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:46:19,631 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:46:19,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:46:19,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:46:19,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:46:19,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:46:19,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:46:19,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:46:19,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:46:20,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:46:20,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:46:20,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:46:20,065 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:46:20,065 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:46:20,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-10-23 21:46:20,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6df200b5e/4906a4cc8cb64881bf28015797b77d2d/FLAG3de78d565 [2020-10-23 21:46:20,819 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:46:20,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2020-10-23 21:46:20,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6df200b5e/4906a4cc8cb64881bf28015797b77d2d/FLAG3de78d565 [2020-10-23 21:46:21,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6df200b5e/4906a4cc8cb64881bf28015797b77d2d [2020-10-23 21:46:21,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:46:21,211 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:46:21,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:46:21,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:46:21,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:46:21,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:46:21" (1/1) ... [2020-10-23 21:46:21,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a31bf92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:21, skipping insertion in model container [2020-10-23 21:46:21,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:46:21" (1/1) ... [2020-10-23 21:46:21,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:46:21,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:46:21,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:46:21,453 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:46:21,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:46:21,483 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:46:21,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:21 WrapperNode [2020-10-23 21:46:21,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:46:21,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:46:21,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:46:21,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:46:21,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:21" (1/1) ... [2020-10-23 21:46:21,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:21" (1/1) ... [2020-10-23 21:46:21,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:21" (1/1) ... [2020-10-23 21:46:21,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:21" (1/1) ... [2020-10-23 21:46:21,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:21" (1/1) ... [2020-10-23 21:46:21,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:21" (1/1) ... [2020-10-23 21:46:21,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:21" (1/1) ... [2020-10-23 21:46:21,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:46:21,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:46:21,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:46:21,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:46:21,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:21" (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 [2020-10-23 21:46:21,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:46:21,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:46:21,645 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:46:21,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:46:21,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:46:21,645 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:46:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:46:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 21:46:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 21:46:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:46:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:46:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:46:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:46:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:46:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:46:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:46:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:46:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:46:21,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:46:21,897 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:46:21,897 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 21:46:21,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:46:21 BoogieIcfgContainer [2020-10-23 21:46:21,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:46:21,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:46:21,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:46:21,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:46:21,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:46:21" (1/3) ... [2020-10-23 21:46:21,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8d9c31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:46:21, skipping insertion in model container [2020-10-23 21:46:21,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:46:21" (2/3) ... [2020-10-23 21:46:21,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8d9c31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:46:21, skipping insertion in model container [2020-10-23 21:46:21,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:46:21" (3/3) ... [2020-10-23 21:46:21,911 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-10-23 21:46:21,927 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:46:21,934 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:46:21,954 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:46:22,004 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:46:22,004 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:46:22,004 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:46:22,004 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:46:22,005 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:46:22,005 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:46:22,005 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:46:22,005 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:46:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-23 21:46:22,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 21:46:22,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:22,068 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] [2020-10-23 21:46:22,071 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:22,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1356775911, now seen corresponding path program 1 times [2020-10-23 21:46:22,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:22,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800731847] [2020-10-23 21:46:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:22,224 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:22,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:22,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800731847] [2020-10-23 21:46:22,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:22,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:46:22,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795075854] [2020-10-23 21:46:22,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:46:22,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:22,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:46:22,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:46:22,531 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-23 21:46:22,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:22,635 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-23 21:46:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:46:22,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-23 21:46:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:22,647 INFO L225 Difference]: With dead ends: 50 [2020-10-23 21:46:22,647 INFO L226 Difference]: Without dead ends: 27 [2020-10-23 21:46:22,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:46:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-23 21:46:22,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-23 21:46:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 21:46:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-23 21:46:22,704 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-10-23 21:46:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:22,705 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-23 21:46:22,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:46:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-23 21:46:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 21:46:22,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:22,707 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] [2020-10-23 21:46:22,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:46:22,707 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:22,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:22,708 INFO L82 PathProgramCache]: Analyzing trace with hash -896925557, now seen corresponding path program 1 times [2020-10-23 21:46:22,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:22,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466262233] [2020-10-23 21:46:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:22,713 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:22,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:22,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466262233] [2020-10-23 21:46:22,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:22,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 21:46:22,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338649920] [2020-10-23 21:46:22,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 21:46:22,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:22,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 21:46:22,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 21:46:22,869 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 4 states. [2020-10-23 21:46:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:23,057 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-23 21:46:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 21:46:23,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-23 21:46:23,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:23,059 INFO L225 Difference]: With dead ends: 45 [2020-10-23 21:46:23,059 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 21:46:23,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 21:46:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 21:46:23,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-23 21:46:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 21:46:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-23 21:46:23,073 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 21 [2020-10-23 21:46:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:23,074 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-23 21:46:23,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 21:46:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-23 21:46:23,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 21:46:23,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:23,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:23,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:46:23,076 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:23,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1043838685, now seen corresponding path program 1 times [2020-10-23 21:46:23,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:23,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601395449] [2020-10-23 21:46:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:25,272 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-10-23 21:46:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:25,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:46:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:46:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:46:26,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601395449] [2020-10-23 21:46:26,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:46:26,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:46:26,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575531610] [2020-10-23 21:46:26,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:46:26,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:46:26,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:46:26,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=59, Unknown=1, NotChecked=0, Total=90 [2020-10-23 21:46:26,967 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 8 states. [2020-10-23 21:46:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:27,487 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-23 21:46:27,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 21:46:27,488 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-23 21:46:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:27,489 INFO L225 Difference]: With dead ends: 47 [2020-10-23 21:46:27,489 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 21:46:27,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=160, Unknown=1, NotChecked=0, Total=240 [2020-10-23 21:46:27,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 21:46:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-23 21:46:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 21:46:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-23 21:46:27,502 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27 [2020-10-23 21:46:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:27,503 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-23 21:46:27,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:46:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-23 21:46:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 21:46:27,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:27,504 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:46:27,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:46:27,505 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2042526766, now seen corresponding path program 1 times [2020-10-23 21:46:27,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:27,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542774358] [2020-10-23 21:46:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:29,931 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-23 21:46:29,934 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:46:29,997 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:46:32,078 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:46:32,122 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:46:32,298 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 26 [2020-10-23 21:46:32,301 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:46:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:46:32,364 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:46:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:46:32,388 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:46:32,413 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 21:46:32,413 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:46:32,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:46:32,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:46:32 BoogieIcfgContainer [2020-10-23 21:46:32,431 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:46:32,433 INFO L168 Benchmark]: Toolchain (without parser) took 11227.67 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 109.5 MB in the beginning and 120.1 MB in the end (delta: -10.6 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:32,433 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:46:32,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.44 ms. Allocated memory is still 151.0 MB. Free memory was 108.9 MB in the beginning and 100.0 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:32,435 INFO L168 Benchmark]: Boogie Preprocessor took 72.31 ms. Allocated memory is still 151.0 MB. Free memory was 100.0 MB in the beginning and 135.5 MB in the end (delta: -35.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:32,436 INFO L168 Benchmark]: RCFGBuilder took 340.57 ms. Allocated memory is still 151.0 MB. Free memory was 135.5 MB in the beginning and 121.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:32,437 INFO L168 Benchmark]: TraceAbstraction took 10528.49 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 121.2 MB in the beginning and 120.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 32.6 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:32,441 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.44 ms. Allocated memory is still 151.0 MB. Free memory was 108.9 MB in the beginning and 100.0 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.31 ms. Allocated memory is still 151.0 MB. Free memory was 100.0 MB in the beginning and 135.5 MB in the end (delta: -35.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.57 ms. Allocated memory is still 151.0 MB. Free memory was 135.5 MB in the beginning and 121.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10528.49 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 121.2 MB in the beginning and 120.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 32.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, sn=0; [L24] i=1 [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND FALSE !(i<=8) [L28] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L15] COND TRUE !(cond) [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum04-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 83 SDtfs, 77 SDslu, 75 SDs, 0 SdLazy, 118 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...