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/nla-digbench/prod4br.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 13:20:22,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 13:20:22,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 13:20:22,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 13:20:22,789 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 13:20:22,803 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 13:20:22,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 13:20:22,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 13:20:22,804 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 13:20:22,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 13:20:22,805 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 13:20:22,805 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 13:20:22,805 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 13:20:22,805 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 13:20:22,806 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 13:20:22,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 13:20:22,806 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 13:20:22,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 13:20:22,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 13:20:22,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 13:20:22,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 13:20:22,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 13:20:22,808 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 13:20:22,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 13:20:22,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 13:20:22,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 13:20:22,809 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 13:20:22,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 13:20:22,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 13:20:22,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 13:20:22,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 13:20:22,810 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 13:20:22,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 13:20:22,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 13:20:22,810 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 13:20:22,857 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 13:20:22,873 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 13:20:22,877 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 13:20:22,879 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 13:20:22,879 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 13:20:22,880 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prod4br.c [2019-09-05 13:20:22,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7df14b8fc/86204db1d552412f8512817534c2627f/FLAG5aa6e702b [2019-09-05 13:20:23,395 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 13:20:23,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prod4br.c [2019-09-05 13:20:23,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7df14b8fc/86204db1d552412f8512817534c2627f/FLAG5aa6e702b [2019-09-05 13:20:23,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7df14b8fc/86204db1d552412f8512817534c2627f [2019-09-05 13:20:23,835 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 13:20:23,836 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 13:20:23,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 13:20:23,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 13:20:23,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 13:20:23,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:20:23" (1/1) ... [2019-09-05 13:20:23,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e607a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:20:23, skipping insertion in model container [2019-09-05 13:20:23,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:20:23" (1/1) ... [2019-09-05 13:20:23,853 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 13:20:23,871 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 13:20:24,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:20:24,041 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 13:20:24,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:20:24,084 INFO L192 MainTranslator]: Completed translation [2019-09-05 13:20:24,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:20:24 WrapperNode [2019-09-05 13:20:24,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 13:20:24,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 13:20:24,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 13:20:24,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 13:20:24,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:20:24" (1/1) ... [2019-09-05 13:20:24,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:20:24" (1/1) ... [2019-09-05 13:20:24,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:20:24" (1/1) ... [2019-09-05 13:20:24,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:20:24" (1/1) ... [2019-09-05 13:20:24,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:20:24" (1/1) ... [2019-09-05 13:20:24,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:20:24" (1/1) ... [2019-09-05 13:20:24,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:20:24" (1/1) ... [2019-09-05 13:20:24,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 13:20:24,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 13:20:24,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 13:20:24,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 13:20:24,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:20:24" (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 13:20:24,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 13:20:24,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 13:20:24,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 13:20:24,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 13:20:24,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 13:20:24,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 13:20:24,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 13:20:24,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 13:20:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 13:20:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 13:20:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 13:20:24,467 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 13:20:24,467 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 13:20:24,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:20:24 BoogieIcfgContainer [2019-09-05 13:20:24,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 13:20:24,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 13:20:24,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 13:20:24,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 13:20:24,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 01:20:23" (1/3) ... [2019-09-05 13:20:24,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b97a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:20:24, skipping insertion in model container [2019-09-05 13:20:24,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:20:24" (2/3) ... [2019-09-05 13:20:24,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b97a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:20:24, skipping insertion in model container [2019-09-05 13:20:24,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:20:24" (3/3) ... [2019-09-05 13:20:24,476 INFO L109 eAbstractionObserver]: Analyzing ICFG prod4br.c [2019-09-05 13:20:24,485 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 13:20:24,493 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 13:20:24,523 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 13:20:24,565 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 13:20:24,565 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 13:20:24,565 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 13:20:24,565 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 13:20:24,566 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 13:20:24,566 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 13:20:24,566 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 13:20:24,566 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 13:20:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-09-05 13:20:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 13:20:24,596 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:20:24,597 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:20:24,599 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:20:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash 152624894, now seen corresponding path program 1 times [2019-09-05 13:20:24,609 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:20:24,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:24,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:24,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:24,661 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:20:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:24,729 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 13:20:24,730 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:20:24,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 13:20:24,731 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:20:24,734 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 13:20:24,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 13:20:24,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 13:20:24,747 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-09-05 13:20:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:20:24,762 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2019-09-05 13:20:24,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 13:20:24,763 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-05 13:20:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:20:24,771 INFO L225 Difference]: With dead ends: 24 [2019-09-05 13:20:24,771 INFO L226 Difference]: Without dead ends: 19 [2019-09-05 13:20:24,773 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 13:20:24,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-05 13:20:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-05 13:20:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-05 13:20:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-09-05 13:20:24,806 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2019-09-05 13:20:24,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:20:24,807 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-09-05 13:20:24,807 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 13:20:24,807 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-09-05 13:20:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 13:20:24,809 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:20:24,809 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:20:24,809 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:20:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:24,810 INFO L82 PathProgramCache]: Analyzing trace with hash 130400808, now seen corresponding path program 1 times [2019-09-05 13:20:24,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:20:24,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:24,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:24,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:24,811 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:20:24,818 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:20:24,818 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:20:24,819 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 13:20:24,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:24,835 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:20:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:24,857 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-05 13:20:24,858 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:20:24,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:20:24,858 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) [2019-09-05 13:20:24,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:24,875 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:20:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:24,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-05 13:20:24,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:20:24,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:25,003 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 13:20:25,004 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:20:25,066 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 13:20:25,069 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:20:25,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-05 13:20:25,070 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:20:25,071 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 13:20:25,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 13:20:25,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-05 13:20:25,072 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2019-09-05 13:20:25,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:20:25,182 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2019-09-05 13:20:25,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 13:20:25,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-05 13:20:25,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:20:25,184 INFO L225 Difference]: With dead ends: 31 [2019-09-05 13:20:25,184 INFO L226 Difference]: Without dead ends: 31 [2019-09-05 13:20:25,186 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-05 13:20:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-05 13:20:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-09-05 13:20:25,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-05 13:20:25,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-09-05 13:20:25,196 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 10 [2019-09-05 13:20:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:20:25,196 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-09-05 13:20:25,197 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 13:20:25,197 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-09-05 13:20:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 13:20:25,198 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:20:25,198 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:20:25,198 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:20:25,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:25,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1836845457, now seen corresponding path program 1 times [2019-09-05 13:20:25,199 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:20:25,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:25,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:25,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:25,200 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:20:25,206 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:20:25,206 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:20:25,206 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 [2019-09-05 13:20:25,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:25,221 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:20:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:25,231 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-05 13:20:25,233 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [43], [46], [48], [51], [53], [54], [55], [56], [58], [59], [60] [2019-09-05 13:20:25,270 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:20:25,271 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:20:25,388 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:20:25,390 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 27 root evaluator evaluations with a maximum evaluation depth of 8. Performed 27 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 8 variables. [2019-09-05 13:20:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:25,394 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:20:25,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:20:25,394 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 13:20:25,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:25,416 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:20:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:25,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-05 13:20:25,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:20:25,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:25,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:20:25,552 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:20:25,642 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:25,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:25,646 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:25,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:25,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:20:25,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:20:25,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-05 13:20:25,713 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:20:25,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 13:20:25,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 13:20:25,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 13:20:25,715 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 13 states. [2019-09-05 13:20:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:20:26,731 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2019-09-05 13:20:26,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 13:20:26,732 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-09-05 13:20:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:20:26,735 INFO L225 Difference]: With dead ends: 39 [2019-09-05 13:20:26,735 INFO L226 Difference]: Without dead ends: 39 [2019-09-05 13:20:26,736 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-09-05 13:20:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-05 13:20:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2019-09-05 13:20:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-05 13:20:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-05 13:20:26,742 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2019-09-05 13:20:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:20:26,743 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-05 13:20:26,743 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 13:20:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-05 13:20:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-05 13:20:26,743 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:20:26,744 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:20:26,744 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:20:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash 682822634, now seen corresponding path program 1 times [2019-09-05 13:20:26,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:20:26,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:26,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:26,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:26,745 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:20:26,756 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:20:26,757 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:20:26,757 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) [2019-09-05 13:20:26,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:26,776 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:20:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:26,787 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2019-09-05 13:20:26,788 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [22], [43], [46], [48], [51], [53], [54], [55], [56], [58], [59] [2019-09-05 13:20:26,792 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:20:26,792 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:20:26,847 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-05 13:20:27,107 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:20:27,118 INFO L272 AbstractInterpreter]: Visited 15 different actions 75 times. Merged at 4 different actions 24 times. Widened at 1 different actions 2 times. Performed 136 root evaluator evaluations with a maximum evaluation depth of 9. Performed 136 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2019-09-05 13:20:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:27,121 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:20:27,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:20:27,121 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) [2019-09-05 13:20:27,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:27,139 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:20:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:27,156 WARN L254 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-05 13:20:27,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:20:27,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:20:27,363 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:20:27,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:27,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:27,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:27,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:27,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:20:27,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:20:27,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-05 13:20:27,571 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:20:27,571 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 13:20:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 13:20:27,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-09-05 13:20:27,572 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 13 states. [2019-09-05 13:20:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:20:27,936 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2019-09-05 13:20:27,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 13:20:27,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-09-05 13:20:27,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:20:27,939 INFO L225 Difference]: With dead ends: 49 [2019-09-05 13:20:27,939 INFO L226 Difference]: Without dead ends: 49 [2019-09-05 13:20:27,939 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-09-05 13:20:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-05 13:20:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2019-09-05 13:20:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-05 13:20:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-09-05 13:20:27,947 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 18 [2019-09-05 13:20:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:20:27,947 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-09-05 13:20:27,947 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 13:20:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-09-05 13:20:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 13:20:27,948 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:20:27,949 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:20:27,949 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:20:27,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:27,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1827366173, now seen corresponding path program 1 times [2019-09-05 13:20:27,949 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:20:27,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:27,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:27,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:27,951 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:20:27,955 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:20:27,955 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:20:27,955 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 [2019-09-05 13:20:27,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:27,982 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:20:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:27,997 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2019-09-05 13:20:27,997 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [24], [27], [43], [46], [48], [51], [53], [54], [55], [56], [58], [59] [2019-09-05 13:20:28,004 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:20:28,005 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:20:28,031 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-05 13:20:28,210 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:20:28,211 INFO L272 AbstractInterpreter]: Visited 16 different actions 71 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Performed 110 root evaluator evaluations with a maximum evaluation depth of 12. Performed 110 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2019-09-05 13:20:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:28,211 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:20:28,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:20:28,211 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 [2019-09-05 13:20:28,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:28,229 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:20:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:28,244 WARN L254 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-05 13:20:28,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:20:28,880 WARN L188 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2019-09-05 13:20:28,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:20:28,925 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:20:29,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:29,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:20:29,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:20:29,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-05 13:20:29,139 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:20:29,140 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 13:20:29,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 13:20:29,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-09-05 13:20:29,140 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 13 states. [2019-09-05 13:20:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:20:29,538 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2019-09-05 13:20:29,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 13:20:29,538 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2019-09-05 13:20:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:20:29,539 INFO L225 Difference]: With dead ends: 55 [2019-09-05 13:20:29,539 INFO L226 Difference]: Without dead ends: 53 [2019-09-05 13:20:29,540 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-09-05 13:20:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-05 13:20:29,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 25. [2019-09-05 13:20:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-05 13:20:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-09-05 13:20:29,545 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2019-09-05 13:20:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:20:29,546 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-09-05 13:20:29,546 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 13:20:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-09-05 13:20:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-05 13:20:29,546 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:20:29,547 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:20:29,547 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:20:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:29,547 INFO L82 PathProgramCache]: Analyzing trace with hash 560958013, now seen corresponding path program 1 times [2019-09-05 13:20:29,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:20:29,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:29,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:29,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:29,549 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:20:29,552 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:20:29,553 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:20:29,553 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:20:29,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:29,573 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:20:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:29,587 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2019-09-05 13:20:29,587 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [43], [46], [48], [51], [53], [54], [55], [56], [58], [59], [60], [61], [62] [2019-09-05 13:20:29,589 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:20:29,589 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:20:29,616 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:20:29,616 INFO L272 AbstractInterpreter]: Visited 17 different actions 27 times. Never merged. Never widened. Performed 35 root evaluator evaluations with a maximum evaluation depth of 8. Performed 35 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 8 variables. [2019-09-05 13:20:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:29,616 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:20:29,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:20:29,617 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:20:29,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:29,636 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:20:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:29,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-05 13:20:29,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:20:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-05 13:20:29,708 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:20:29,732 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-05 13:20:29,742 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:20:29,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2019-09-05 13:20:29,743 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:20:29,743 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 13:20:29,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 13:20:29,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-05 13:20:29,744 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-09-05 13:20:29,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:20:29,812 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2019-09-05 13:20:29,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 13:20:29,812 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-09-05 13:20:29,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:20:29,813 INFO L225 Difference]: With dead ends: 35 [2019-09-05 13:20:29,814 INFO L226 Difference]: Without dead ends: 31 [2019-09-05 13:20:29,814 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-05 13:20:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-05 13:20:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-05 13:20:29,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-05 13:20:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-09-05 13:20:29,818 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 21 [2019-09-05 13:20:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:20:29,819 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-09-05 13:20:29,819 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 13:20:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-09-05 13:20:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 13:20:29,820 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:20:29,820 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:20:29,820 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:20:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:29,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1615173920, now seen corresponding path program 1 times [2019-09-05 13:20:29,821 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:20:29,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:29,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:29,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:29,822 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:20:29,826 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:20:29,827 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:20:29,827 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 13:20:29,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:29,853 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:20:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:29,863 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2019-09-05 13:20:29,864 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [24], [29], [32], [43], [46], [48], [51], [53], [54], [55], [56], [58], [59], [60], [61], [62] [2019-09-05 13:20:29,866 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:20:29,866 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:20:29,879 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-05 13:20:30,628 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:20:30,628 INFO L272 AbstractInterpreter]: Visited 21 different actions 161 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Performed 209 root evaluator evaluations with a maximum evaluation depth of 12. Performed 209 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2019-09-05 13:20:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:30,629 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:20:30,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:20:30,629 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:20:30,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:30,650 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:20:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:30,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-05 13:20:30,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:20:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-05 13:20:30,718 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:20:30,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-05 13:20:30,752 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:20:30,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2019-09-05 13:20:30,752 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:20:30,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 13:20:30,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 13:20:30,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-05 13:20:30,754 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 6 states. [2019-09-05 13:20:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:20:30,818 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2019-09-05 13:20:30,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 13:20:30,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-09-05 13:20:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:20:30,820 INFO L225 Difference]: With dead ends: 40 [2019-09-05 13:20:30,820 INFO L226 Difference]: Without dead ends: 36 [2019-09-05 13:20:30,821 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-05 13:20:30,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-05 13:20:30,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-09-05 13:20:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-05 13:20:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-09-05 13:20:30,825 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 31 [2019-09-05 13:20:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:20:30,825 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-09-05 13:20:30,826 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 13:20:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-09-05 13:20:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 13:20:30,827 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:20:30,827 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:20:30,827 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:20:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:30,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1091445474, now seen corresponding path program 1 times [2019-09-05 13:20:30,828 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:20:30,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:30,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:30,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:20:30,829 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:20:30,833 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:20:30,833 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:20:30,833 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:20:30,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:30,855 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:20:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:30,865 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2019-09-05 13:20:30,865 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [24], [29], [34], [43], [46], [48], [51], [53], [54], [55], [56], [58], [59], [60], [61], [62] [2019-09-05 13:20:30,867 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:20:30,867 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:20:30,876 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-05 13:20:31,445 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:20:31,446 INFO L272 AbstractInterpreter]: Visited 21 different actions 161 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Performed 246 root evaluator evaluations with a maximum evaluation depth of 12. Performed 246 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2019-09-05 13:20:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:20:31,446 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:20:31,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:20:31,446 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:20:31,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:20:31,465 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:20:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:20:31,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-05 13:20:31,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:20:31,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-05 13:20:31,524 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:20:31,549 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:20:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-05 13:20:31,564 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-05 13:20:31,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2019-09-05 13:20:31,565 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:20:31,565 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 13:20:31,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 13:20:31,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-09-05 13:20:31,566 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 5 states. [2019-09-05 13:20:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:20:31,681 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2019-09-05 13:20:31,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 13:20:31,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-09-05 13:20:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:20:31,682 INFO L225 Difference]: With dead ends: 31 [2019-09-05 13:20:31,682 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 13:20:31,682 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-05 13:20:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 13:20:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 13:20:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 13:20:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 13:20:31,683 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2019-09-05 13:20:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:20:31,684 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 13:20:31,684 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 13:20:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 13:20:31,684 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 13:20:31,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 01:20:31 BoogieIcfgContainer [2019-09-05 13:20:31,690 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 13:20:31,692 INFO L168 Benchmark]: Toolchain (without parser) took 7855.51 ms. Allocated memory was 131.1 MB in the beginning and 373.8 MB in the end (delta: 242.7 MB). Free memory was 87.0 MB in the beginning and 217.2 MB in the end (delta: -130.2 MB). Peak memory consumption was 112.5 MB. Max. memory is 7.1 GB. [2019-09-05 13:20:31,692 INFO L168 Benchmark]: CDTParser took 1.86 ms. Allocated memory is still 131.1 MB. Free memory was 105.3 MB in the beginning and 105.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 13:20:31,693 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.63 ms. Allocated memory is still 131.1 MB. Free memory was 86.8 MB in the beginning and 76.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2019-09-05 13:20:31,694 INFO L168 Benchmark]: Boogie Preprocessor took 133.67 ms. Allocated memory was 131.1 MB in the beginning and 198.7 MB in the end (delta: 67.6 MB). Free memory was 76.6 MB in the beginning and 175.0 MB in the end (delta: -98.4 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-09-05 13:20:31,695 INFO L168 Benchmark]: RCFGBuilder took 249.43 ms. Allocated memory is still 198.7 MB. Free memory was 175.0 MB in the beginning and 161.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-09-05 13:20:31,696 INFO L168 Benchmark]: TraceAbstraction took 7220.27 ms. Allocated memory was 198.7 MB in the beginning and 373.8 MB in the end (delta: 175.1 MB). Free memory was 161.4 MB in the beginning and 217.2 MB in the end (delta: -55.8 MB). Peak memory consumption was 119.3 MB. Max. memory is 7.1 GB. [2019-09-05 13:20:31,700 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.86 ms. Allocated memory is still 131.1 MB. Free memory was 105.3 MB in the beginning and 105.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.63 ms. Allocated memory is still 131.1 MB. Free memory was 86.8 MB in the beginning and 76.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.67 ms. Allocated memory was 131.1 MB in the beginning and 198.7 MB in the end (delta: 67.6 MB). Free memory was 76.6 MB in the beginning and 175.0 MB in the end (delta: -98.4 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 249.43 ms. Allocated memory is still 198.7 MB. Free memory was 175.0 MB in the beginning and 161.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7220.27 ms. Allocated memory was 198.7 MB in the beginning and 373.8 MB in the end (delta: 175.1 MB). Free memory was 161.4 MB in the beginning and 217.2 MB in the end (delta: -55.8 MB). Peak memory consumption was 119.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: 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, 24 locations, 1 error locations. SAFE Result, 7.1s OverallTime, 8 OverallIterations, 4 TraceHistogramMax, 2.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 151 SDtfs, 121 SDslu, 464 SDs, 0 SdLazy, 578 SolverSat, 56 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 298 GetRequests, 220 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.0s AbstIntTime, 6 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 55 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 302 NumberOfCodeBlocks, 302 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 287 ConstructedInterpolants, 3 QuantifiedInterpolants, 22593 SizeOfPredicates, 33 NumberOfNonLiveVariables, 412 ConjunctsInSsa, 119 ConjunctsInUnsatCore, 15 InterpolantComputations, 8 PerfectInterpolantSequences, 107/120 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...