/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:46:31,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:46:31,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:46:31,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:46:31,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:46:31,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:46:31,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:46:31,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:46:31,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:46:31,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:46:31,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:46:31,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:46:31,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:46:31,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:46:31,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:46:31,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:46:31,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:46:31,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:46:31,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:46:31,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:46:31,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:46:31,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:46:31,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:46:31,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:46:31,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:46:31,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:46:31,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:46:31,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:46:31,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:46:31,489 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:46:31,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:46:31,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:46:31,492 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:46:31,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:46:31,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:46:31,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:46:31,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:46:31,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:46:31,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:46:31,493 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:46:31,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:46:31,493 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:46:31,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:46:31,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:46:31,494 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:46:31,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:46:31,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:46:31,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:46:31,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:46:31,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:46:31,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:46:31,496 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:46:31,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:46:31,962 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:46:31,967 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:46:31,969 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:46:31,969 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:46:31,970 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_3-1.c [2020-09-04 17:46:32,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee8eef628/df6b770207cb4f029ca066445eebcc32/FLAGad5cc5daa [2020-09-04 17:46:32,646 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:46:32,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_3-1.c [2020-09-04 17:46:32,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee8eef628/df6b770207cb4f029ca066445eebcc32/FLAGad5cc5daa [2020-09-04 17:46:32,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee8eef628/df6b770207cb4f029ca066445eebcc32 [2020-09-04 17:46:32,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:46:33,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:46:33,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:46:33,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:46:33,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:46:33,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:46:32" (1/1) ... [2020-09-04 17:46:33,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ebb096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:33, skipping insertion in model container [2020-09-04 17:46:33,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:46:32" (1/1) ... [2020-09-04 17:46:33,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:46:33,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:46:33,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:46:33,278 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:46:33,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:46:33,318 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:46:33,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:33 WrapperNode [2020-09-04 17:46:33,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:46:33,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:46:33,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:46:33,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:46:33,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:33" (1/1) ... [2020-09-04 17:46:33,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:33" (1/1) ... [2020-09-04 17:46:33,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:33" (1/1) ... [2020-09-04 17:46:33,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:33" (1/1) ... [2020-09-04 17:46:33,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:33" (1/1) ... [2020-09-04 17:46:33,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:33" (1/1) ... [2020-09-04 17:46:33,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:33" (1/1) ... [2020-09-04 17:46:33,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:46:33,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:46:33,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:46:33,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:46:33,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 17:46:33,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:46:33,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:46:33,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:46:33,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:46:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:46:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2020-09-04 17:46:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:46:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:46:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:46:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:46:33,724 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:46:33,725 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 17:46:33,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:46:33 BoogieIcfgContainer [2020-09-04 17:46:33,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:46:33,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:46:33,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:46:33,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:46:33,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:46:32" (1/3) ... [2020-09-04 17:46:33,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19517422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:46:33, skipping insertion in model container [2020-09-04 17:46:33,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:33" (2/3) ... [2020-09-04 17:46:33,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19517422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:46:33, skipping insertion in model container [2020-09-04 17:46:33,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:46:33" (3/3) ... [2020-09-04 17:46:33,740 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_3-1.c [2020-09-04 17:46:33,751 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:46:33,762 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:46:33,784 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:46:33,814 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:46:33,814 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:46:33,814 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:46:33,814 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:46:33,814 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:46:33,815 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:46:33,815 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:46:33,815 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:46:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-04 17:46:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 17:46:33,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:33,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:33,845 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:33,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:33,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1456818433, now seen corresponding path program 1 times [2020-09-04 17:46:33,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:33,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969931185] [2020-09-04 17:46:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:33,935 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:34,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:34,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969931185] [2020-09-04 17:46:34,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:34,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 17:46:34,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962970193] [2020-09-04 17:46:34,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 17:46:34,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:34,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 17:46:34,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 17:46:34,052 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-09-04 17:46:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:34,085 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-09-04 17:46:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 17:46:34,088 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-04 17:46:34,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:34,099 INFO L225 Difference]: With dead ends: 31 [2020-09-04 17:46:34,099 INFO L226 Difference]: Without dead ends: 14 [2020-09-04 17:46:34,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 17:46:34,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-04 17:46:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-04 17:46:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-04 17:46:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-09-04 17:46:34,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-09-04 17:46:34,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:34,157 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-09-04 17:46:34,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 17:46:34,158 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-09-04 17:46:34,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 17:46:34,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:34,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:34,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:46:34,160 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:34,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1452200828, now seen corresponding path program 1 times [2020-09-04 17:46:34,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:34,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973922535] [2020-09-04 17:46:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:34,163 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 17:46:34,185 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 17:46:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 17:46:34,208 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 17:46:34,228 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 17:46:34,228 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 17:46:34,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:46:34,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:46:34 BoogieIcfgContainer [2020-09-04 17:46:34,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:46:34,253 INFO L168 Benchmark]: Toolchain (without parser) took 1251.11 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 103.0 MB in the beginning and 147.7 MB in the end (delta: -44.8 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:34,254 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-04 17:46:34,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.69 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 93.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:34,257 INFO L168 Benchmark]: Boogie Preprocessor took 119.18 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 181.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:34,258 INFO L168 Benchmark]: RCFGBuilder took 289.49 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 170.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:34,259 INFO L168 Benchmark]: TraceAbstraction took 518.83 ms. Allocated memory is still 202.9 MB. Free memory was 170.7 MB in the beginning and 147.7 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:34,263 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.69 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 93.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.18 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 181.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 289.49 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 170.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 518.83 ms. Allocated memory is still 202.9 MB. Free memory was 170.7 MB in the beginning and 147.7 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned short N = __VERIFIER_nondet_ushort(); [L15] COND FALSE !(x < N) [L19] CALL __VERIFIER_assert(x % 2) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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...