/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/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:57:32,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:57:32,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:57:32,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 01:57:33,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:57:33,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:57:33,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:57:33,026 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 01:57:33,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:57:33,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:57:33,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:57:33,046 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:57:33,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:57:33,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:57:33,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:57:33,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:57:33,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:57:33,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:57:33,049 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:57:33,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:57:33,049 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:57:33,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:57:33,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:57:33,050 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:57:33,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:57:33,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:57:33,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:57:33,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:57:33,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:57:33,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:57:33,052 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:57:33,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:57:33,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:57:33,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:57:33,539 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:57:33,540 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:57:33,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-11-07 01:57:33,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f4ed8181/4370061571984f8dbf21fbba2c7b3832/FLAG05f4a2d81 [2020-11-07 01:57:34,307 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:57:34,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2020-11-07 01:57:34,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f4ed8181/4370061571984f8dbf21fbba2c7b3832/FLAG05f4a2d81 [2020-11-07 01:57:34,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f4ed8181/4370061571984f8dbf21fbba2c7b3832 [2020-11-07 01:57:34,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:57:34,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:57:34,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:57:34,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:57:34,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:57:34,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:34" (1/1) ... [2020-11-07 01:57:34,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b40c27a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:34, skipping insertion in model container [2020-11-07 01:57:34,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:57:34" (1/1) ... [2020-11-07 01:57:34,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:57:34,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:57:35,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:57:35,012 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:57:35,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:57:35,056 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:57:35,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:35 WrapperNode [2020-11-07 01:57:35,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:57:35,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:57:35,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:57:35,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:57:35,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:35" (1/1) ... [2020-11-07 01:57:35,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:35" (1/1) ... [2020-11-07 01:57:35,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:35" (1/1) ... [2020-11-07 01:57:35,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:35" (1/1) ... [2020-11-07 01:57:35,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:35" (1/1) ... [2020-11-07 01:57:35,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:35" (1/1) ... [2020-11-07 01:57:35,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:35" (1/1) ... [2020-11-07 01:57:35,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:57:35,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:57:35,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:57:35,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:57:35,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:35" (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 01:57:35,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:57:35,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:57:35,218 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:57:35,218 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:57:35,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:57:35,218 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:57:35,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:57:35,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 01:57:35,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 01:57:35,219 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:57:35,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:57:35,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:57:35,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 01:57:35,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:57:35,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:57:35,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:57:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:57:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:57:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:57:35,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:57:35,696 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:57:35,696 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 01:57:35,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:35 BoogieIcfgContainer [2020-11-07 01:57:35,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:57:35,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:57:35,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:57:35,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:57:35,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:57:34" (1/3) ... [2020-11-07 01:57:35,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e52ad6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:35, skipping insertion in model container [2020-11-07 01:57:35,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:57:35" (2/3) ... [2020-11-07 01:57:35,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e52ad6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:57:35, skipping insertion in model container [2020-11-07 01:57:35,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:57:35" (3/3) ... [2020-11-07 01:57:35,713 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-11-07 01:57:35,731 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:57:35,735 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:57:35,749 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:57:35,791 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:57:35,792 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:57:35,792 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:57:35,792 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:57:35,792 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:57:35,792 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:57:35,793 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:57:35,793 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:57:35,814 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-11-07 01:57:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-07 01:57:35,829 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:35,830 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] [2020-11-07 01:57:35,830 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:35,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1475454684, now seen corresponding path program 1 times [2020-11-07 01:57:35,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:35,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059050860] [2020-11-07 01:57:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:35,945 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:36,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:36,152 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 01:57:36,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059050860] [2020-11-07 01:57:36,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:36,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:57:36,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157969355] [2020-11-07 01:57:36,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:57:36,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:36,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:57:36,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:57:36,181 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-11-07 01:57:36,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:36,283 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-11-07 01:57:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:57:36,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-07 01:57:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:36,293 INFO L225 Difference]: With dead ends: 52 [2020-11-07 01:57:36,294 INFO L226 Difference]: Without dead ends: 29 [2020-11-07 01:57:36,297 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 [2020-11-07 01:57:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-07 01:57:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-07 01:57:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-07 01:57:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-11-07 01:57:36,348 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2020-11-07 01:57:36,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:36,349 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-11-07 01:57:36,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:57:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-11-07 01:57:36,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-07 01:57:36,350 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:36,350 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] [2020-11-07 01:57:36,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:57:36,351 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:36,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1935305038, now seen corresponding path program 1 times [2020-11-07 01:57:36,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:36,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785706902] [2020-11-07 01:57:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:36,356 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:36,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:36,489 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 01:57:36,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785706902] [2020-11-07 01:57:36,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:36,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 01:57:36,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670295065] [2020-11-07 01:57:36,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 01:57:36,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:36,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 01:57:36,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:57:36,492 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2020-11-07 01:57:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:36,710 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-11-07 01:57:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 01:57:36,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-07 01:57:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:36,712 INFO L225 Difference]: With dead ends: 42 [2020-11-07 01:57:36,712 INFO L226 Difference]: Without dead ends: 35 [2020-11-07 01:57:36,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 01:57:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-07 01:57:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-11-07 01:57:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-07 01:57:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-07 01:57:36,727 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 23 [2020-11-07 01:57:36,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:36,728 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-07 01:57:36,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 01:57:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-07 01:57:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-07 01:57:36,729 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:36,729 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, 1, 1] [2020-11-07 01:57:36,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:57:36,730 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:36,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1625328538, now seen corresponding path program 1 times [2020-11-07 01:57:36,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:36,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872272416] [2020-11-07 01:57:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:38,996 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-11-07 01:57:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:39,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:39,257 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 01:57:39,428 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-11-07 01:57:40,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872272416] [2020-11-07 01:57:40,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:40,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 01:57:40,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392531744] [2020-11-07 01:57:40,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 01:57:40,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:40,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 01:57:40,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-11-07 01:57:40,062 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 15 states. [2020-11-07 01:57:40,984 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-11-07 01:57:41,256 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-11-07 01:57:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:41,417 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-11-07 01:57:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 01:57:41,418 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-11-07 01:57:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:41,419 INFO L225 Difference]: With dead ends: 61 [2020-11-07 01:57:41,419 INFO L226 Difference]: Without dead ends: 40 [2020-11-07 01:57:41,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2020-11-07 01:57:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-07 01:57:41,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-11-07 01:57:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 01:57:41,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-07 01:57:41,433 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 29 [2020-11-07 01:57:41,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:41,434 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-07 01:57:41,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 01:57:41,434 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-07 01:57:41,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 01:57:41,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:41,435 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, 1, 1] [2020-11-07 01:57:41,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:57:41,436 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:41,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:41,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1487589007, now seen corresponding path program 1 times [2020-11-07 01:57:41,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:41,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162123021] [2020-11-07 01:57:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:45,691 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:57:47,794 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:57:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:57:47,826 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:57:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:57:47,855 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:57:47,882 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 01:57:47,882 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 01:57:47,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:57:47,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:57:47 BoogieIcfgContainer [2020-11-07 01:57:47,902 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 01:57:47,907 INFO L168 Benchmark]: Toolchain (without parser) took 13202.44 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 141.1 MB in the beginning and 118.6 MB in the end (delta: 22.5 MB). Peak memory consumption was 57.3 MB. Max. memory is 8.0 GB. [2020-11-07 01:57:47,908 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory was 101.4 MB in the beginning and 101.3 MB in the end (delta: 68.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 01:57:47,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.95 ms. Allocated memory is still 164.6 MB. Free memory was 140.5 MB in the beginning and 131.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 01:57:47,911 INFO L168 Benchmark]: Boogie Preprocessor took 58.83 ms. Allocated memory is still 164.6 MB. Free memory was 131.3 MB in the beginning and 129.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 01:57:47,914 INFO L168 Benchmark]: RCFGBuilder took 580.63 ms. Allocated memory is still 164.6 MB. Free memory was 129.8 MB in the beginning and 147.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. [2020-11-07 01:57:47,916 INFO L168 Benchmark]: TraceAbstraction took 12198.43 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 147.4 MB in the beginning and 118.6 MB in the end (delta: 28.9 MB). Peak memory consumption was 62.3 MB. Max. memory is 8.0 GB. [2020-11-07 01:57:47,923 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory was 101.4 MB in the beginning and 101.3 MB in the end (delta: 68.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 343.95 ms. Allocated memory is still 164.6 MB. Free memory was 140.5 MB in the beginning and 131.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.83 ms. Allocated memory is still 164.6 MB. Free memory was 131.3 MB in the beginning and 129.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 580.63 ms. Allocated memory is still 164.6 MB. Free memory was 129.8 MB in the beginning and 147.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12198.43 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 147.4 MB in the beginning and 118.6 MB in the end (delta: 28.9 MB). Peak memory consumption was 62.3 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, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND FALSE !(i<10) [L24] i++ [L24] COND FALSE !(i<=n) [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L15] COND TRUE !(cond) [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum01-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.0s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 102 SDslu, 125 SDs, 0 SdLazy, 223 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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, 4 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...