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 0.1.24-0883e75 [2019-09-05 13:07:18,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 13:07:18,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 13:07:18,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 13:07:18,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 13:07:18,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 13:07:18,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 13:07:18,924 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 [2019-09-05 13:07:18,939 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 13:07:18,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 13:07:18,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 13:07:18,940 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 13:07:18,941 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 13:07:18,941 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 13:07:18,941 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 13:07:18,941 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 13:07:18,942 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 13:07:18,942 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 13:07:18,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 13:07:18,943 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 13:07:18,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 13:07:18,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 13:07:18,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 13:07:18,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 13:07:18,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 13:07:18,944 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 13:07:18,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 13:07:18,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 13:07:18,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 13:07:18,945 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 13:07:18,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 13:07:18,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 13:07:18,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 13:07:18,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 13:07:18,946 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 13:07:18,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 13:07:18,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 13:07:18,946 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 13:07:18,976 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 13:07:18,989 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 13:07:18,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 13:07:18,994 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 13:07:18,994 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 13:07:18,995 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2019-09-05 13:07:19,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e55636c4/9417b5161e4e4b94bcf90a08ff18c034/FLAGc15c472a4 [2019-09-05 13:07:19,478 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 13:07:19,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2019-09-05 13:07:19,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e55636c4/9417b5161e4e4b94bcf90a08ff18c034/FLAGc15c472a4 [2019-09-05 13:07:19,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e55636c4/9417b5161e4e4b94bcf90a08ff18c034 [2019-09-05 13:07:19,893 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 13:07:19,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 13:07:19,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 13:07:19,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 13:07:19,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 13:07:19,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:07:19" (1/1) ... [2019-09-05 13:07:19,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61fa6ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:19, skipping insertion in model container [2019-09-05 13:07:19,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:07:19" (1/1) ... [2019-09-05 13:07:19,911 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 13:07:19,928 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 13:07:20,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:07:20,115 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 13:07:20,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:07:20,155 INFO L192 MainTranslator]: Completed translation [2019-09-05 13:07:20,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:20 WrapperNode [2019-09-05 13:07:20,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 13:07:20,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 13:07:20,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 13:07:20,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 13:07:20,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:20" (1/1) ... [2019-09-05 13:07:20,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:20" (1/1) ... [2019-09-05 13:07:20,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:20" (1/1) ... [2019-09-05 13:07:20,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:20" (1/1) ... [2019-09-05 13:07:20,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:20" (1/1) ... [2019-09-05 13:07:20,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:20" (1/1) ... [2019-09-05 13:07:20,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:20" (1/1) ... [2019-09-05 13:07:20,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 13:07:20,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 13:07:20,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 13:07:20,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 13:07:20,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:20" (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 [2019-09-05 13:07:20,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 13:07:20,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 13:07:20,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 13:07:20,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 13:07:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 13:07:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 13:07:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 13:07:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 13:07:20,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 13:07:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 13:07:20,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 13:07:20,503 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 13:07:20,503 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 13:07:20,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:07:20 BoogieIcfgContainer [2019-09-05 13:07:20,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 13:07:20,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 13:07:20,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 13:07:20,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 13:07:20,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 01:07:19" (1/3) ... [2019-09-05 13:07:20,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f1b109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:07:20, skipping insertion in model container [2019-09-05 13:07:20,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:20" (2/3) ... [2019-09-05 13:07:20,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f1b109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:07:20, skipping insertion in model container [2019-09-05 13:07:20,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:07:20" (3/3) ... [2019-09-05 13:07:20,513 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2019-09-05 13:07:20,523 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 13:07:20,530 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 13:07:20,546 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 13:07:20,572 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 13:07:20,573 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 13:07:20,573 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 13:07:20,573 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 13:07:20,573 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 13:07:20,573 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 13:07:20,573 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 13:07:20,574 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 13:07:20,586 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-05 13:07:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-05 13:07:20,595 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:07:20,596 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:07:20,598 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:07:20,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:07:20,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1281911547, now seen corresponding path program 1 times [2019-09-05 13:07:20,605 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:07:20,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:20,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:20,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:20,644 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:07:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:20,723 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:07:20,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 13:07:20,723 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:07:20,728 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 13:07:20,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 13:07:20,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 13:07:20,746 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-05 13:07:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:07:20,762 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-09-05 13:07:20,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 13:07:20,764 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-09-05 13:07:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:07:20,771 INFO L225 Difference]: With dead ends: 20 [2019-09-05 13:07:20,771 INFO L226 Difference]: Without dead ends: 13 [2019-09-05 13:07:20,772 INFO L628 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 [2019-09-05 13:07:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-05 13:07:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-05 13:07:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-05 13:07:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-05 13:07:20,803 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-05 13:07:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:07:20,803 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-05 13:07:20,804 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 13:07:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-05 13:07:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-05 13:07:20,805 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:07:20,806 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:07:20,807 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:07:20,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:07:20,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1287452673, now seen corresponding path program 1 times [2019-09-05 13:07:20,809 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:07:20,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:20,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:20,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:20,813 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:07:20,821 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:07:20,821 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:07:20,821 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 [2019-09-05 13:07:20,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:20,833 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:07:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:20,846 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-05 13:07:20,847 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:07:20,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:07:20,847 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 [2019-09-05 13:07:20,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:20,860 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:07:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:20,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-05 13:07:20,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:07:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:20,939 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:07:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:20,968 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:07:20,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-09-05 13:07:20,968 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:07:20,969 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-05 13:07:20,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-05 13:07:20,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-05 13:07:20,974 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2019-09-05 13:07:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:07:21,000 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-05 13:07:21,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-05 13:07:21,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-09-05 13:07:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:07:21,001 INFO L225 Difference]: With dead ends: 15 [2019-09-05 13:07:21,002 INFO L226 Difference]: Without dead ends: 15 [2019-09-05 13:07:21,003 INFO L628 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 [2019-09-05 13:07:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-05 13:07:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-09-05 13:07:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-05 13:07:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-05 13:07:21,007 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-09-05 13:07:21,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:07:21,007 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-05 13:07:21,007 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-05 13:07:21,007 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-05 13:07:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 13:07:21,008 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:07:21,008 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:07:21,009 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:07:21,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:07:21,009 INFO L82 PathProgramCache]: Analyzing trace with hash 843923389, now seen corresponding path program 1 times [2019-09-05 13:07:21,010 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:07:21,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:21,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:21,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:21,012 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:07:21,021 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:07:21,022 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:07:21,022 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) [2019-09-05 13:07:21,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:21,038 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:07:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:21,053 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2019-09-05 13:07:21,055 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [14], [16], [18], [25], [28], [30], [36], [37], [38], [40] [2019-09-05 13:07:21,092 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:07:21,092 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:07:21,268 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:07:21,271 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. [2019-09-05 13:07:21,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:07:21,275 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:07:21,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:07:21,276 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 [2019-09-05 13:07:21,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:21,297 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:07:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:21,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 13:07:21,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:07:21,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:07:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:21,416 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:07:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:21,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:07:21,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-09-05 13:07:21,630 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:07:21,631 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 13:07:21,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 13:07:21,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-09-05 13:07:21,632 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2019-09-05 13:07:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:07:21,819 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-05 13:07:21,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 13:07:21,822 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2019-09-05 13:07:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:07:21,823 INFO L225 Difference]: With dead ends: 19 [2019-09-05 13:07:21,823 INFO L226 Difference]: Without dead ends: 16 [2019-09-05 13:07:21,824 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-09-05 13:07:21,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-05 13:07:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-05 13:07:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-05 13:07:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-05 13:07:21,833 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-09-05 13:07:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:07:21,834 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-05 13:07:21,834 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 13:07:21,835 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-05 13:07:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-05 13:07:21,835 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:07:21,835 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:07:21,836 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:07:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:07:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash 396918779, now seen corresponding path program 2 times [2019-09-05 13:07:21,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:07:21,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:21,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:21,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:21,838 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:07:21,845 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:07:21,846 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:07:21,846 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 [2019-09-05 13:07:21,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 13:07:21,859 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:07:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:21,870 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 13:07:21,870 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:07:21,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:07:21,871 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 [2019-09-05 13:07:21,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 13:07:21,887 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-05 13:07:21,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-05 13:07:21,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 13:07:21,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-05 13:07:21,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:07:21,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:07:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:22,014 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:07:24,175 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 [2019-09-05 13:07:24,199 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 [2019-09-05 13:07:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-09-05 13:07:24,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:07:24,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-09-05 13:07:24,218 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:07:24,219 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 13:07:24,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 13:07:24,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=197, Unknown=4, NotChecked=58, Total=306 [2019-09-05 13:07:24,220 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 18 states. [2019-09-05 13:07:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:07:24,673 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-09-05 13:07:24,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 13:07:24,674 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2019-09-05 13:07:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:07:24,675 INFO L225 Difference]: With dead ends: 24 [2019-09-05 13:07:24,676 INFO L226 Difference]: Without dead ends: 20 [2019-09-05 13:07:24,677 INFO L628 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 [2019-09-05 13:07:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-05 13:07:24,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-05 13:07:24,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-05 13:07:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-05 13:07:24,682 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 15 [2019-09-05 13:07:24,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:07:24,683 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-05 13:07:24,683 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 13:07:24,683 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-05 13:07:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 13:07:24,684 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:07:24,684 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:07:24,685 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:07:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:07:24,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1549375991, now seen corresponding path program 3 times [2019-09-05 13:07:24,686 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:07:24,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:24,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 13:07:24,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:24,690 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:07:24,715 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:07:24,716 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:07:24,716 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) [2019-09-05 13:07:24,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 13:07:24,749 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:07:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:24,766 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 13:07:24,766 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:07:24,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:07:24,766 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) [2019-09-05 13:07:24,796 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 13:07:24,796 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:07:24,818 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 13:07:24,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 13:07:24,819 WARN L254 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-05 13:07:24,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:07:24,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:07:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:25,023 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:07:25,415 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 [2019-09-05 13:07:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 2 times theorem prover too weak. 3 trivial. 4 not checked. [2019-09-05 13:07:27,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:07:27,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2019-09-05 13:07:27,139 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:07:27,139 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 13:07:27,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 13:07:27,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=4, NotChecked=40, Total=506 [2019-09-05 13:07:27,140 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 23 states. [2019-09-05 13:07:29,341 WARN L188 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2019-09-05 13:07:29,441 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 [2019-09-05 13:07:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:07:29,490 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-09-05 13:07:29,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 13:07:29,490 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 19 [2019-09-05 13:07:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:07:29,491 INFO L225 Difference]: With dead ends: 21 [2019-09-05 13:07:29,491 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 13:07:29,492 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=143, Invalid=915, Unknown=6, NotChecked=126, Total=1190 [2019-09-05 13:07:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 13:07:29,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 13:07:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 13:07:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 13:07:29,493 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2019-09-05 13:07:29,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:07:29,493 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 13:07:29,494 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 13:07:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 13:07:29,494 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 13:07:29,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 01:07:29 BoogieIcfgContainer [2019-09-05 13:07:29,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 13:07:29,501 INFO L168 Benchmark]: Toolchain (without parser) took 9606.49 ms. Allocated memory was 143.1 MB in the beginning and 251.7 MB in the end (delta: 108.5 MB). Free memory was 91.0 MB in the beginning and 141.6 MB in the end (delta: -50.6 MB). Peak memory consumption was 57.9 MB. Max. memory is 7.1 GB. [2019-09-05 13:07:29,502 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 143.1 MB. Free memory was 109.2 MB in the beginning and 109.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 13:07:29,503 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.82 ms. Allocated memory is still 143.1 MB. Free memory was 90.8 MB in the beginning and 81.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-09-05 13:07:29,504 INFO L168 Benchmark]: Boogie Preprocessor took 134.03 ms. Allocated memory was 143.1 MB in the beginning and 199.8 MB in the end (delta: 56.6 MB). Free memory was 81.2 MB in the beginning and 177.9 MB in the end (delta: -96.7 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-05 13:07:29,505 INFO L168 Benchmark]: RCFGBuilder took 214.03 ms. Allocated memory is still 199.8 MB. Free memory was 177.9 MB in the beginning and 166.5 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-05 13:07:29,506 INFO L168 Benchmark]: TraceAbstraction took 8993.69 ms. Allocated memory was 199.8 MB in the beginning and 251.7 MB in the end (delta: 51.9 MB). Free memory was 166.5 MB in the beginning and 141.6 MB in the end (delta: 24.8 MB). Peak memory consumption was 76.7 MB. Max. memory is 7.1 GB. [2019-09-05 13:07:29,510 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 143.1 MB. Free memory was 109.2 MB in the beginning and 109.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.82 ms. Allocated memory is still 143.1 MB. Free memory was 90.8 MB in the beginning and 81.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.03 ms. Allocated memory was 143.1 MB in the beginning and 199.8 MB in the end (delta: 56.6 MB). Free memory was 81.2 MB in the beginning and 177.9 MB in the end (delta: -96.7 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 214.03 ms. Allocated memory is still 199.8 MB. Free memory was 177.9 MB in the beginning and 166.5 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8993.69 ms. Allocated memory was 199.8 MB in the beginning and 251.7 MB in the end (delta: 51.9 MB). Free memory was 166.5 MB in the beginning and 141.6 MB in the end (delta: 24.8 MB). Peak memory consumption was 76.7 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, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 7.1s 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, 0.2s 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, 0.0s 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...