/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/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:45:36,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:45:36,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:45:36,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:45:36,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:45:36,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:45:36,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:45:36,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:45:36,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:45:36,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:45:36,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:45:36,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:45:36,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:45:36,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:45:36,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:45:36,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:45:36,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:45:36,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:45:36,786 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:45:36,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:45:36,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:45:36,788 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:45:36,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:45:36,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:45:36,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:45:36,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:45:36,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:45:36,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:45:36,790 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:45:36,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:45:36,790 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:45:36,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:45:36,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:45:36,791 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:45:36,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:45:36,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:45:36,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:45:36,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:45:36,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:45:36,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:45:36,792 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:45:37,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:45:37,157 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:45:37,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:45:37,164 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:45:37,165 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:45:37,166 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-22 19:45:37,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb05d3876/5d4e5f46c107473db124ba4ff6701edb/FLAGba84a4ac4 [2020-08-22 19:45:37,749 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:45:37,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2020-08-22 19:45:37,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb05d3876/5d4e5f46c107473db124ba4ff6701edb/FLAGba84a4ac4 [2020-08-22 19:45:38,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb05d3876/5d4e5f46c107473db124ba4ff6701edb [2020-08-22 19:45:38,165 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:45:38,166 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:45:38,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:45:38,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:45:38,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:45:38,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff5a9d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38, skipping insertion in model container [2020-08-22 19:45:38,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:45:38,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:45:38,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:45:38,391 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:45:38,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:45:38,427 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:45:38,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38 WrapperNode [2020-08-22 19:45:38,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:45:38,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:45:38,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:45:38,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:45:38,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:45:38,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:45:38,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:45:38,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:45:38,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (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 [2020-08-22 19:45:38,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:45:38,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:45:38,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:45:38,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:45:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:45:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:45:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 19:45:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:45:38,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:45:38,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:45:38,928 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:45:38,928 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:45:38,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:45:38 BoogieIcfgContainer [2020-08-22 19:45:38,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:45:38,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:45:38,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:45:38,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:45:38,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:45:38" (1/3) ... [2020-08-22 19:45:38,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b501ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:45:38, skipping insertion in model container [2020-08-22 19:45:38,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (2/3) ... [2020-08-22 19:45:38,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b501ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:45:38, skipping insertion in model container [2020-08-22 19:45:38,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:45:38" (3/3) ... [2020-08-22 19:45:38,944 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-08-22 19:45:38,957 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:45:38,966 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:45:38,989 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:45:39,047 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:45:39,049 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:45:39,049 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:45:39,049 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:45:39,050 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:45:39,050 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:45:39,051 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:45:39,051 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:45:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-08-22 19:45:39,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 19:45:39,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:39,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:39,092 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:39,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:39,103 INFO L82 PathProgramCache]: Analyzing trace with hash 79158399, now seen corresponding path program 1 times [2020-08-22 19:45:39,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:39,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074030448] [2020-08-22 19:45:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:39,202 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:39,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:39,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074030448] [2020-08-22 19:45:39,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:39,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:45:39,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724749550] [2020-08-22 19:45:39,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:45:39,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:39,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:45:39,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:45:39,326 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-08-22 19:45:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:39,358 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-08-22 19:45:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:45:39,360 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-08-22 19:45:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:39,371 INFO L225 Difference]: With dead ends: 41 [2020-08-22 19:45:39,371 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 19:45:39,375 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 [2020-08-22 19:45:39,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 19:45:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 19:45:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 19:45:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 19:45:39,424 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-08-22 19:45:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:39,425 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 19:45:39,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:45:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 19:45:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 19:45:39,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:39,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:39,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:45:39,428 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash 62535021, now seen corresponding path program 1 times [2020-08-22 19:45:39,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:39,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957548332] [2020-08-22 19:45:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:39,431 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:39,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:39,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957548332] [2020-08-22 19:45:39,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:39,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:45:39,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616888857] [2020-08-22 19:45:39,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:45:39,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:39,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:45:39,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:45:39,541 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2020-08-22 19:45:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:39,598 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-08-22 19:45:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:45:39,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-22 19:45:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:39,601 INFO L225 Difference]: With dead ends: 38 [2020-08-22 19:45:39,601 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 19:45:39,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:45:39,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 19:45:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-22 19:45:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 19:45:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-22 19:45:39,615 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 15 [2020-08-22 19:45:39,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:39,616 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-22 19:45:39,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:45:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-22 19:45:39,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 19:45:39,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:39,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:39,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:45:39,619 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:39,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:39,619 INFO L82 PathProgramCache]: Analyzing trace with hash 268436001, now seen corresponding path program 1 times [2020-08-22 19:45:39,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:39,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740097082] [2020-08-22 19:45:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:40,228 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-08-22 19:45:40,291 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 19:45:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:40,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:52,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740097082] [2020-08-22 19:45:52,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:52,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 19:45:52,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96631973] [2020-08-22 19:45:52,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 19:45:52,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:52,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 19:45:52,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=275, Unknown=3, NotChecked=0, Total=342 [2020-08-22 19:45:52,272 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2020-08-22 19:46:01,303 WARN L193 SmtUtils]: Spent 8.24 s on a formula simplification. DAG size of input: 129 DAG size of output: 128 [2020-08-22 19:46:05,542 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 131 DAG size of output: 106 [2020-08-22 19:46:06,580 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 154 [2020-08-22 19:46:07,503 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 107 [2020-08-22 19:46:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:08,764 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-08-22 19:46:08,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 19:46:08,771 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-08-22 19:46:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:08,773 INFO L225 Difference]: With dead ends: 57 [2020-08-22 19:46:08,773 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 19:46:08,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=111, Invalid=535, Unknown=4, NotChecked=0, Total=650 [2020-08-22 19:46:08,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 19:46:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-08-22 19:46:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 19:46:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-08-22 19:46:08,802 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 24 [2020-08-22 19:46:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:08,802 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-08-22 19:46:08,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 19:46:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-08-22 19:46:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 19:46:08,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:08,804 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:08,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:46:08,804 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:08,805 INFO L82 PathProgramCache]: Analyzing trace with hash -635017609, now seen corresponding path program 1 times [2020-08-22 19:46:08,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:08,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537916093] [2020-08-22 19:46:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:13,043 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-08-22 19:46:13,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:46:13,046 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: must have same length at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.pairwiseEquality(SmtUtils.java:418) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.constructEpsilon(AcceleratedInterpolation.java:334) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:420) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:293) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 19:46:13,051 INFO L168 Benchmark]: Toolchain (without parser) took 34884.04 ms. Allocated memory was 137.9 MB in the beginning and 245.4 MB in the end (delta: 107.5 MB). Free memory was 101.9 MB in the beginning and 201.4 MB in the end (delta: -99.5 MB). Peak memory consumption was 112.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:13,052 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 137.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:46:13,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.73 ms. Allocated memory is still 137.9 MB. Free memory was 101.7 MB in the beginning and 92.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:13,054 INFO L168 Benchmark]: Boogie Preprocessor took 177.60 ms. Allocated memory was 137.9 MB in the beginning and 206.0 MB in the end (delta: 68.2 MB). Free memory was 92.2 MB in the beginning and 184.7 MB in the end (delta: -92.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:13,055 INFO L168 Benchmark]: RCFGBuilder took 327.25 ms. Allocated memory is still 206.0 MB. Free memory was 184.7 MB in the beginning and 171.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:13,056 INFO L168 Benchmark]: TraceAbstraction took 34114.02 ms. Allocated memory was 206.0 MB in the beginning and 245.4 MB in the end (delta: 39.3 MB). Free memory was 171.1 MB in the beginning and 201.4 MB in the end (delta: -30.3 MB). Peak memory consumption was 113.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:13,060 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 137.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.73 ms. Allocated memory is still 137.9 MB. Free memory was 101.7 MB in the beginning and 92.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 177.60 ms. Allocated memory was 137.9 MB in the beginning and 206.0 MB in the end (delta: 68.2 MB). Free memory was 92.2 MB in the beginning and 184.7 MB in the end (delta: -92.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 327.25 ms. Allocated memory is still 206.0 MB. Free memory was 184.7 MB in the beginning and 171.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 34114.02 ms. Allocated memory was 206.0 MB in the beginning and 245.4 MB in the end (delta: 39.3 MB). Free memory was 171.1 MB in the beginning and 201.4 MB in the end (delta: -30.3 MB). Peak memory consumption was 113.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: must have same length de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: must have same length: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.pairwiseEquality(SmtUtils.java:418) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...