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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-03 02:34:01,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-03 02:34:01,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-03 02:34:01,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-03 02:34:01,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-03 02:34:01,625 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-03 02:34:01,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-03 02:34:01,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-03 02:34:01,625 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-03 02:34:01,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-03 02:34:01,626 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-03 02:34:01,626 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-03 02:34:01,627 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-03 02:34:01,627 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-03 02:34:01,627 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-03 02:34:01,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-03 02:34:01,628 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-03 02:34:01,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-03 02:34:01,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-03 02:34:01,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-03 02:34:01,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-03 02:34:01,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-03 02:34:01,630 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-03 02:34:01,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-03 02:34:01,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-03 02:34:01,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-03 02:34:01,630 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-03 02:34:01,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-03 02:34:01,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:34:01,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-03 02:34:01,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-03 02:34:01,631 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-03 02:34:01,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-03 02:34:01,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-03 02:34:01,632 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-03 02:34:01,660 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-03 02:34:01,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-03 02:34:01,676 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-03 02:34:01,678 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-03 02:34:01,678 INFO L275 PluginConnector]: CDTParser initialized [2019-10-03 02:34:01,679 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2019-10-03 02:34:01,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0a2ce04/0a0ecfc8c1b74f93b7a70ffe644f3b2f/FLAG9cb62219d [2019-10-03 02:34:02,155 INFO L306 CDTParser]: Found 1 translation units. [2019-10-03 02:34:02,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2019-10-03 02:34:02,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0a2ce04/0a0ecfc8c1b74f93b7a70ffe644f3b2f/FLAG9cb62219d [2019-10-03 02:34:02,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0a2ce04/0a0ecfc8c1b74f93b7a70ffe644f3b2f [2019-10-03 02:34:02,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-03 02:34:02,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-03 02:34:02,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-03 02:34:02,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-03 02:34:02,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-03 02:34:02,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:34:02" (1/1) ... [2019-10-03 02:34:02,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13c5ffca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:02, skipping insertion in model container [2019-10-03 02:34:02,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:34:02" (1/1) ... [2019-10-03 02:34:02,577 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-03 02:34:02,602 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-03 02:34:02,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:34:02,871 INFO L188 MainTranslator]: Completed pre-run [2019-10-03 02:34:02,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:34:02,910 INFO L192 MainTranslator]: Completed translation [2019-10-03 02:34:02,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:02 WrapperNode [2019-10-03 02:34:02,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-03 02:34:02,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-03 02:34:02,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-03 02:34:02,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-03 02:34:03,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:02" (1/1) ... [2019-10-03 02:34:03,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:02" (1/1) ... [2019-10-03 02:34:03,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:02" (1/1) ... [2019-10-03 02:34:03,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:02" (1/1) ... [2019-10-03 02:34:03,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:02" (1/1) ... [2019-10-03 02:34:03,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:02" (1/1) ... [2019-10-03 02:34:03,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:02" (1/1) ... [2019-10-03 02:34:03,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-03 02:34:03,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-03 02:34:03,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-03 02:34:03,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-03 02:34:03,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:02" (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 [2019-10-03 02:34:03,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-03 02:34:03,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-03 02:34:03,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-03 02:34:03,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-03 02:34:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-03 02:34:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-03 02:34:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-03 02:34:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-03 02:34:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-03 02:34:03,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-03 02:34:03,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-03 02:34:03,309 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-03 02:34:03,309 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-03 02:34:03,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:34:03 BoogieIcfgContainer [2019-10-03 02:34:03,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-03 02:34:03,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-03 02:34:03,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-03 02:34:03,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-03 02:34:03,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 02:34:02" (1/3) ... [2019-10-03 02:34:03,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd2f27a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:34:03, skipping insertion in model container [2019-10-03 02:34:03,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:02" (2/3) ... [2019-10-03 02:34:03,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd2f27a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:34:03, skipping insertion in model container [2019-10-03 02:34:03,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:34:03" (3/3) ... [2019-10-03 02:34:03,319 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2019-10-03 02:34:03,329 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-03 02:34:03,336 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-03 02:34:03,353 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-03 02:34:03,381 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-03 02:34:03,382 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-03 02:34:03,382 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-03 02:34:03,382 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-03 02:34:03,382 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-03 02:34:03,382 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-03 02:34:03,382 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-03 02:34:03,383 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-03 02:34:03,396 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-03 02:34:03,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-03 02:34:03,406 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:03,407 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:03,409 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:03,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1281911547, now seen corresponding path program 1 times [2019-10-03 02:34:03,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:03,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:03,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:03,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:03,463 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:03,528 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:34:03,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-03 02:34:03,528 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:34:03,533 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-03 02:34:03,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-03 02:34:03,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:34:03,547 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-03 02:34:03,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:03,561 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-10-03 02:34:03,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-03 02:34:03,562 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-10-03 02:34:03,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:03,570 INFO L225 Difference]: With dead ends: 20 [2019-10-03 02:34:03,571 INFO L226 Difference]: Without dead ends: 13 [2019-10-03 02:34:03,572 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:34:03,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-03 02:34:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-03 02:34:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-03 02:34:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-03 02:34:03,602 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-03 02:34:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:03,603 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-03 02:34:03,603 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-03 02:34:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-03 02:34:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-03 02:34:03,604 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:03,604 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:03,604 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:03,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1287452673, now seen corresponding path program 1 times [2019-10-03 02:34:03,605 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:03,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:03,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:03,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:03,607 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:03,615 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:34:03,615 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:34:03,615 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:34:03,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:03,646 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:34:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:03,660 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-10-03 02:34:03,661 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:34:03,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:03,661 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:34:03,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:03,678 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:34:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:03,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-03 02:34:03,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:03,767 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:03,830 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:34:03,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-03 02:34:03,831 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:34:03,832 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-03 02:34:03,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-03 02:34:03,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-03 02:34:03,834 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2019-10-03 02:34:03,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:03,858 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-10-03 02:34:03,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-03 02:34:03,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-03 02:34:03,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:03,867 INFO L225 Difference]: With dead ends: 15 [2019-10-03 02:34:03,867 INFO L226 Difference]: Without dead ends: 15 [2019-10-03 02:34:03,868 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-03 02:34:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-03 02:34:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-10-03 02:34:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-03 02:34:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-03 02:34:03,878 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-10-03 02:34:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:03,878 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-03 02:34:03,878 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-03 02:34:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-03 02:34:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-03 02:34:03,880 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:03,881 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:03,881 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:03,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:03,882 INFO L82 PathProgramCache]: Analyzing trace with hash 843923389, now seen corresponding path program 1 times [2019-10-03 02:34:03,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:03,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:03,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:03,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:03,884 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:03,901 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:34:03,902 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:34:03,902 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:34:03,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:03,923 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:34:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:03,936 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2019-10-03 02:34:03,938 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [14], [16], [18], [25], [28], [30], [36], [37], [38], [40] [2019-10-03 02:34:03,969 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:34:03,969 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:34:04,094 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:34:04,098 INFO L272 AbstractInterpreter]: Visited 13 different actions 44 times. Merged at 3 different actions 14 times. Widened at 1 different actions 3 times. Performed 72 root evaluator evaluations with a maximum evaluation depth of 6. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2019-10-03 02:34:04,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:04,102 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:34:04,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:04,102 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:34:04,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:04,142 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:34:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:04,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-03 02:34:04,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:04,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:34:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:04,291 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:04,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-03 02:34:04,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-10-03 02:34:04,492 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:34:04,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-03 02:34:04,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-03 02:34:04,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-03 02:34:04,494 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2019-10-03 02:34:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:04,705 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-03 02:34:04,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-03 02:34:04,705 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2019-10-03 02:34:04,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:04,706 INFO L225 Difference]: With dead ends: 19 [2019-10-03 02:34:04,706 INFO L226 Difference]: Without dead ends: 16 [2019-10-03 02:34:04,707 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-10-03 02:34:04,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-03 02:34:04,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-03 02:34:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-03 02:34:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-03 02:34:04,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-10-03 02:34:04,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:04,711 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-03 02:34:04,712 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-03 02:34:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-03 02:34:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-03 02:34:04,712 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:04,713 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:04,713 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:04,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:04,713 INFO L82 PathProgramCache]: Analyzing trace with hash 396918779, now seen corresponding path program 2 times [2019-10-03 02:34:04,714 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:04,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:04,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:04,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:04,715 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:04,723 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:34:04,723 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:34:04,724 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:34:04,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-03 02:34:04,738 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:34:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:04,763 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-03 02:34:04,764 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:34:04,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:04,764 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:34:04,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-03 02:34:04,780 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-10-03 02:34:04,805 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-03 02:34:04,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-03 02:34:04,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-03 02:34:04,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:04,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:34:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:04,944 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:07,097 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0)))) is different from true [2019-10-03 02:34:07,119 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (< main_~n~0 .cse0) (= (+ (* 4 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0))))) is different from true [2019-10-03 02:34:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-10-03 02:34:07,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-03 02:34:07,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-10-03 02:34:07,133 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:34:07,134 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-03 02:34:07,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-03 02:34:07,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=197, Unknown=4, NotChecked=58, Total=306 [2019-10-03 02:34:07,135 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 18 states. [2019-10-03 02:34:07,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:07,611 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-10-03 02:34:07,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-03 02:34:07,612 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2019-10-03 02:34:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:07,613 INFO L225 Difference]: With dead ends: 24 [2019-10-03 02:34:07,613 INFO L226 Difference]: Without dead ends: 20 [2019-10-03 02:34:07,613 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=82, Invalid=384, Unknown=4, NotChecked=82, Total=552 [2019-10-03 02:34:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-03 02:34:07,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-03 02:34:07,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-03 02:34:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-03 02:34:07,621 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 15 [2019-10-03 02:34:07,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:07,622 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-03 02:34:07,622 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-03 02:34:07,622 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-03 02:34:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-03 02:34:07,625 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:07,625 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:07,626 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:07,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1549375991, now seen corresponding path program 3 times [2019-10-03 02:34:07,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:07,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:07,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-03 02:34:07,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:07,631 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:07,648 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:34:07,648 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:34:07,651 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:34:07,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-03 02:34:07,678 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:34:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:07,692 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-03 02:34:07,692 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:34:07,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:07,693 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:34:07,726 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-03 02:34:07,727 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-10-03 02:34:07,745 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-03 02:34:07,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-03 02:34:07,746 WARN L254 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-03 02:34:07,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:07,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:34:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:07,975 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:08,310 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 2))) (or (= (+ (* 4 c_main_~i~0) (* 2 c_main_~sum~0) 6) (* (+ main_~n~0 1) main_~n~0)) (< .cse0 main_~n~0) (< main_~n~0 .cse0)))) is different from true [2019-10-03 02:34:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 2 times theorem prover too weak. 3 trivial. 4 not checked. [2019-10-03 02:34:09,999 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-03 02:34:09,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2019-10-03 02:34:09,999 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:34:10,000 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-03 02:34:10,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-03 02:34:10,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=4, NotChecked=40, Total=506 [2019-10-03 02:34:10,004 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 23 states. [2019-10-03 02:34:12,183 WARN L191 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2019-10-03 02:34:12,277 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((main_~n~0 Int)) (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< c_main_~i~0 main_~n~0) (< main_~n~0 c_main_~i~0))) (or (<= c_main_~i~0 c_main_~n~0) (= (* 2 c_main_~sum~0) (* (+ c_main_~n~0 1) c_main_~n~0)))) is different from true [2019-10-03 02:34:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:12,329 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-10-03 02:34:12,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-03 02:34:12,330 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 19 [2019-10-03 02:34:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:12,331 INFO L225 Difference]: With dead ends: 21 [2019-10-03 02:34:12,331 INFO L226 Difference]: Without dead ends: 0 [2019-10-03 02:34:12,332 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=143, Invalid=915, Unknown=6, NotChecked=126, Total=1190 [2019-10-03 02:34:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-03 02:34:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-03 02:34:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-03 02:34:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-03 02:34:12,333 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2019-10-03 02:34:12,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:12,334 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-03 02:34:12,334 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-03 02:34:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-03 02:34:12,334 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-03 02:34:12,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 02:34:12 BoogieIcfgContainer [2019-10-03 02:34:12,339 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-03 02:34:12,340 INFO L168 Benchmark]: Toolchain (without parser) took 9786.35 ms. Allocated memory was 142.1 MB in the beginning and 253.2 MB in the end (delta: 111.1 MB). Free memory was 89.5 MB in the beginning and 134.6 MB in the end (delta: -45.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:12,341 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 142.1 MB. Free memory was 108.1 MB in the beginning and 107.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-03 02:34:12,342 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.99 ms. Allocated memory is still 142.1 MB. Free memory was 89.3 MB in the beginning and 79.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:12,344 INFO L168 Benchmark]: Boogie Preprocessor took 137.14 ms. Allocated memory was 142.1 MB in the beginning and 201.3 MB in the end (delta: 59.2 MB). Free memory was 79.9 MB in the beginning and 179.0 MB in the end (delta: -99.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:12,345 INFO L168 Benchmark]: RCFGBuilder took 260.65 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 167.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:12,346 INFO L168 Benchmark]: TraceAbstraction took 9026.51 ms. Allocated memory was 201.3 MB in the beginning and 253.2 MB in the end (delta: 51.9 MB). Free memory was 166.7 MB in the beginning and 134.6 MB in the end (delta: 32.2 MB). Peak memory consumption was 84.1 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:12,350 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 142.1 MB. Free memory was 108.1 MB in the beginning and 107.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 353.99 ms. Allocated memory is still 142.1 MB. Free memory was 89.3 MB in the beginning and 79.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.14 ms. Allocated memory was 142.1 MB in the beginning and 201.3 MB in the end (delta: 59.2 MB). Free memory was 79.9 MB in the beginning and 179.0 MB in the end (delta: -99.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 260.65 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 167.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9026.51 ms. Allocated memory was 201.3 MB in the beginning and 253.2 MB in the end (delta: 51.9 MB). Free memory was 166.7 MB in the beginning and 134.6 MB in the end (delta: 32.2 MB). Peak memory consumption was 84.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 8.9s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 3.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 57 SDtfs, 14 SDslu, 178 SDs, 0 SdLazy, 286 SolverSat, 26 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 7.2s 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, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 127 NumberOfCodeBlocks, 127 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 118 ConstructedInterpolants, 10 QuantifiedInterpolants, 10306 SizeOfPredicates, 15 NumberOfNonLiveVariables, 155 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 5/42 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...