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/eca-rers2012/Problem14_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 20:32:23,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:32:23,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:32:23,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 20:32:23,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 20:32:23,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 20:32:23,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 20:32:23,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 20:32:23,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 20:32:23,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 20:32:23,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 20:32:23,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-10-02 20:32:23,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 20:32:23,864 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:32:23,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:32:23,864 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:32:23,865 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:32:23,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:32:23,866 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:32:23,866 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:32:23,866 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:32:23,867 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:32:23,867 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:32:23,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:32:23,869 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:32:23,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:32:23,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:32:23,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:32:23,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:32:23,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:32:23,870 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:32:23,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:32:23,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:32:23,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:32:23,871 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:32:23,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:32:23,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:32:23,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:32:23,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:32:23,872 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:32:23,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:32:23,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:32:23,873 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:32:23,908 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:32:23,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:32:23,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:32:23,927 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:32:23,927 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:32:23,928 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label26.c [2019-10-02 20:32:23,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32d25362e/bfefeabc4e074dd7afc7564d2fa10d84/FLAGeaaee1152 [2019-10-02 20:32:24,561 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:32:24,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label26.c [2019-10-02 20:32:24,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32d25362e/bfefeabc4e074dd7afc7564d2fa10d84/FLAGeaaee1152 [2019-10-02 20:32:24,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32d25362e/bfefeabc4e074dd7afc7564d2fa10d84 [2019-10-02 20:32:24,828 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:32:24,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:32:24,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:32:24,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:32:24,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:32:24,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:32:24" (1/1) ... [2019-10-02 20:32:24,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2504eb85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:32:24, skipping insertion in model container [2019-10-02 20:32:24,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:32:24" (1/1) ... [2019-10-02 20:32:24,845 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:32:24,920 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:32:25,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:32:25,522 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:32:25,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:32:25,729 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:32:25,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:32:25 WrapperNode [2019-10-02 20:32:25,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:32:25,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:32:25,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:32:25,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:32:25,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:32:25" (1/1) ... [2019-10-02 20:32:25,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:32:25" (1/1) ... [2019-10-02 20:32:25,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:32:25" (1/1) ... [2019-10-02 20:32:25,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:32:25" (1/1) ... [2019-10-02 20:32:25,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:32:25" (1/1) ... [2019-10-02 20:32:25,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:32:25" (1/1) ... [2019-10-02 20:32:25,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:32:25" (1/1) ... [2019-10-02 20:32:25,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:32:25,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:32:25,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:32:25,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:32:25,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:32:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:32:25,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:32:25,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:32:25,944 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:32:25,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:32:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:32:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:32:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:32:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:32:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:32:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:32:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:32:27,419 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:32:27,419 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:32:27,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:32:27 BoogieIcfgContainer [2019-10-02 20:32:27,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:32:27,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:32:27,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:32:27,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:32:27,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:32:24" (1/3) ... [2019-10-02 20:32:27,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dfc433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:32:27, skipping insertion in model container [2019-10-02 20:32:27,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:32:25" (2/3) ... [2019-10-02 20:32:27,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dfc433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:32:27, skipping insertion in model container [2019-10-02 20:32:27,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:32:27" (3/3) ... [2019-10-02 20:32:27,430 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label26.c [2019-10-02 20:32:27,440 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:32:27,449 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:32:27,466 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:32:27,505 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:32:27,506 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:32:27,506 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:32:27,506 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:32:27,506 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:32:27,507 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:32:27,507 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:32:27,507 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:32:27,539 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-02 20:32:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-02 20:32:27,556 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:32:27,557 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:32:27,560 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:32:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:32:27,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1385105165, now seen corresponding path program 1 times [2019-10-02 20:32:27,568 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:32:27,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:32:27,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:32:27,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:32:27,618 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:32:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:32:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:32:27,916 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:32:27,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 20:32:27,916 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:32:27,923 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 20:32:27,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 20:32:27,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 20:32:27,942 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-02 20:32:29,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:32:29,245 INFO L93 Difference]: Finished difference Result 440 states and 713 transitions. [2019-10-02 20:32:29,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 20:32:29,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2019-10-02 20:32:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:32:29,273 INFO L225 Difference]: With dead ends: 440 [2019-10-02 20:32:29,273 INFO L226 Difference]: Without dead ends: 372 [2019-10-02 20:32:29,276 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 20:32:29,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-02 20:32:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-02 20:32:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-02 20:32:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 596 transitions. [2019-10-02 20:32:29,388 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 596 transitions. Word has length 72 [2019-10-02 20:32:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:32:29,389 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 596 transitions. [2019-10-02 20:32:29,389 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 20:32:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 596 transitions. [2019-10-02 20:32:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-02 20:32:29,397 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:32:29,398 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:32:29,398 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:32:29,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:32:29,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1505037462, now seen corresponding path program 1 times [2019-10-02 20:32:29,399 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:32:29,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:32:29,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:32:29,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:32:29,401 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:32:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:32:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:32:29,657 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:32:29,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:32:29,657 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:32:29,659 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:32:29,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:32:29,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:32:29,661 INFO L87 Difference]: Start difference. First operand 372 states and 596 transitions. Second operand 5 states. [2019-10-02 20:32:31,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:32:31,006 INFO L93 Difference]: Finished difference Result 574 states and 848 transitions. [2019-10-02 20:32:31,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 20:32:31,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2019-10-02 20:32:31,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:32:31,013 INFO L225 Difference]: With dead ends: 574 [2019-10-02 20:32:31,013 INFO L226 Difference]: Without dead ends: 574 [2019-10-02 20:32:31,015 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-02 20:32:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2019-10-02 20:32:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 564. [2019-10-02 20:32:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2019-10-02 20:32:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 831 transitions. [2019-10-02 20:32:31,054 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 831 transitions. Word has length 148 [2019-10-02 20:32:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:32:31,055 INFO L475 AbstractCegarLoop]: Abstraction has 564 states and 831 transitions. [2019-10-02 20:32:31,055 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:32:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 831 transitions. [2019-10-02 20:32:31,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-10-02 20:32:31,062 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:32:31,063 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:32:31,063 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:32:31,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:32:31,064 INFO L82 PathProgramCache]: Analyzing trace with hash 430034666, now seen corresponding path program 1 times [2019-10-02 20:32:31,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:32:31,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:32:31,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:32:31,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:32:31,066 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:32:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:32:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:32:31,293 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:32:31,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 20:32:31,294 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:32:31,295 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 20:32:31,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 20:32:31,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:32:31,295 INFO L87 Difference]: Start difference. First operand 564 states and 831 transitions. Second operand 6 states. [2019-10-02 20:32:32,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:32:32,704 INFO L93 Difference]: Finished difference Result 968 states and 1421 transitions. [2019-10-02 20:32:32,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:32:32,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 212 [2019-10-02 20:32:32,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:32:32,712 INFO L225 Difference]: With dead ends: 968 [2019-10-02 20:32:32,712 INFO L226 Difference]: Without dead ends: 968 [2019-10-02 20:32:32,712 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 20:32:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2019-10-02 20:32:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 942. [2019-10-02 20:32:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 942 states. [2019-10-02 20:32:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1352 transitions. [2019-10-02 20:32:32,754 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1352 transitions. Word has length 212 [2019-10-02 20:32:32,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:32:32,755 INFO L475 AbstractCegarLoop]: Abstraction has 942 states and 1352 transitions. [2019-10-02 20:32:32,756 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 20:32:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1352 transitions. [2019-10-02 20:32:32,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-10-02 20:32:32,762 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:32:32,762 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:32:32,763 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:32:32,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:32:32,763 INFO L82 PathProgramCache]: Analyzing trace with hash -68983624, now seen corresponding path program 1 times [2019-10-02 20:32:32,763 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:32:32,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:32:32,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:32:32,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:32:32,765 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:32:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:32:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 204 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:32:32,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:32:32,998 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:32:32,999 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 232 with the following transitions: [2019-10-02 20:32:33,001 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [550], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:32:33,086 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:32:33,086 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:32:37,387 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:32:37,389 INFO L272 AbstractInterpreter]: Visited 88 different actions 88 times. Never merged. Never widened. Performed 215 root evaluator evaluations with a maximum evaluation depth of 13. Performed 215 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 20:32:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:32:37,393 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:32:41,032 INFO L227 lantSequenceWeakener]: Weakened 212 states. On average, predicates are now at 78.57% of their original sizes. [2019-10-02 20:32:41,033 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:32:41,103 INFO L420 sIntCurrentIteration]: We unified 230 AI predicates to 230 [2019-10-02 20:32:41,103 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:32:41,104 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:32:41,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 20:32:41,104 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:32:41,105 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:32:41,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:32:41,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:32:41,106 INFO L87 Difference]: Start difference. First operand 942 states and 1352 transitions. Second operand 10 states. [2019-10-02 20:34:01,606 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:36:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:36:44,292 INFO L93 Difference]: Finished difference Result 1128 states and 1547 transitions. [2019-10-02 20:36:44,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 20:36:44,293 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 231 [2019-10-02 20:36:44,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:36:44,299 INFO L225 Difference]: With dead ends: 1128 [2019-10-02 20:36:44,299 INFO L226 Difference]: Without dead ends: 1128 [2019-10-02 20:36:44,301 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-02 20:36:44,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2019-10-02 20:36:44,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1124. [2019-10-02 20:36:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2019-10-02 20:36:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1541 transitions. [2019-10-02 20:36:44,332 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1541 transitions. Word has length 231 [2019-10-02 20:36:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:36:44,333 INFO L475 AbstractCegarLoop]: Abstraction has 1124 states and 1541 transitions. [2019-10-02 20:36:44,333 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 20:36:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1541 transitions. [2019-10-02 20:36:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-10-02 20:36:44,339 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:36:44,339 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:36:44,339 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:36:44,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:36:44,340 INFO L82 PathProgramCache]: Analyzing trace with hash 674513393, now seen corresponding path program 1 times [2019-10-02 20:36:44,340 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:36:44,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:36:44,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:36:44,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:36:44,342 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:36:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:36:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 280 proven. 146 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 20:36:44,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:36:44,943 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:36:44,943 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 316 with the following transitions: [2019-10-02 20:36:44,944 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:36:44,950 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:36:44,950 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:36:48,471 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:36:48,472 INFO L272 AbstractInterpreter]: Visited 93 different actions 181 times. Merged at 4 different actions 5 times. Never widened. Performed 400 root evaluator evaluations with a maximum evaluation depth of 13. Performed 400 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 20:36:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:36:48,473 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:36:50,951 INFO L227 lantSequenceWeakener]: Weakened 312 states. On average, predicates are now at 78.08% of their original sizes. [2019-10-02 20:36:50,952 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:36:51,050 INFO L420 sIntCurrentIteration]: We unified 314 AI predicates to 314 [2019-10-02 20:36:51,051 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:36:51,051 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:36:51,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-10-02 20:36:51,051 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:36:51,052 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 20:36:51,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 20:36:51,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 20:36:51,053 INFO L87 Difference]: Start difference. First operand 1124 states and 1541 transitions. Second operand 11 states. [2019-10-02 20:37:26,686 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:37:54,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:37:54,232 INFO L93 Difference]: Finished difference Result 1340 states and 1768 transitions. [2019-10-02 20:37:54,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 20:37:54,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 315 [2019-10-02 20:37:54,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:37:54,239 INFO L225 Difference]: With dead ends: 1340 [2019-10-02 20:37:54,239 INFO L226 Difference]: Without dead ends: 1340 [2019-10-02 20:37:54,240 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 20:37:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2019-10-02 20:37:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1124. [2019-10-02 20:37:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2019-10-02 20:37:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1541 transitions. [2019-10-02 20:37:54,269 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1541 transitions. Word has length 315 [2019-10-02 20:37:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:37:54,270 INFO L475 AbstractCegarLoop]: Abstraction has 1124 states and 1541 transitions. [2019-10-02 20:37:54,270 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 20:37:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1541 transitions. [2019-10-02 20:37:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2019-10-02 20:37:54,277 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:37:54,277 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:37:54,278 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:37:54,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:37:54,278 INFO L82 PathProgramCache]: Analyzing trace with hash 460924741, now seen corresponding path program 1 times [2019-10-02 20:37:54,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:37:54,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:37:54,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:37:54,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:37:54,280 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:37:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:37:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 252 proven. 125 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-02 20:37:54,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:37:54,627 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:37:54,627 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 342 with the following transitions: [2019-10-02 20:37:54,628 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:37:54,637 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:37:54,637 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:38:10,749 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:38:10,749 INFO L272 AbstractInterpreter]: Visited 119 different actions 233 times. Merged at 4 different actions 5 times. Never widened. Performed 557 root evaluator evaluations with a maximum evaluation depth of 13. Performed 557 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 20:38:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:38:10,750 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:38:18,763 INFO L227 lantSequenceWeakener]: Weakened 338 states. On average, predicates are now at 78.02% of their original sizes. [2019-10-02 20:38:18,763 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:38:18,831 INFO L420 sIntCurrentIteration]: We unified 340 AI predicates to 340 [2019-10-02 20:38:18,831 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:38:18,831 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:38:18,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-10-02 20:38:18,831 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:38:18,832 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 20:38:18,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 20:38:18,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-02 20:38:18,833 INFO L87 Difference]: Start difference. First operand 1124 states and 1541 transitions. Second operand 11 states. [2019-10-02 20:39:03,399 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:40:14,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:40:14,941 INFO L93 Difference]: Finished difference Result 1492 states and 1931 transitions. [2019-10-02 20:40:14,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 20:40:14,942 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 341 [2019-10-02 20:40:14,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:40:14,950 INFO L225 Difference]: With dead ends: 1492 [2019-10-02 20:40:14,950 INFO L226 Difference]: Without dead ends: 1492 [2019-10-02 20:40:14,950 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-10-02 20:40:14,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2019-10-02 20:40:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1490. [2019-10-02 20:40:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1490 states. [2019-10-02 20:40:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 1929 transitions. [2019-10-02 20:40:14,983 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 1929 transitions. Word has length 341 [2019-10-02 20:40:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:40:14,984 INFO L475 AbstractCegarLoop]: Abstraction has 1490 states and 1929 transitions. [2019-10-02 20:40:14,984 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 20:40:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 1929 transitions. [2019-10-02 20:40:14,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2019-10-02 20:40:14,988 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:40:14,989 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:40:14,989 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:40:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:40:14,989 INFO L82 PathProgramCache]: Analyzing trace with hash -272128015, now seen corresponding path program 1 times [2019-10-02 20:40:14,990 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:40:14,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:40:14,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:40:14,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:40:14,991 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:40:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:40:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 348 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-02 20:40:15,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:40:15,238 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:40:15,238 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 368 with the following transitions: [2019-10-02 20:40:15,239 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:40:15,243 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:40:15,243 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:40:30,214 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:40:59,623 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:40:59,624 INFO L272 AbstractInterpreter]: Visited 119 different actions 579 times. Merged at 6 different actions 24 times. Never widened. Performed 1143 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1143 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 5 fixpoints after 2 different actions. Largest state had 24 variables. [2019-10-02 20:40:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:40:59,625 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:41:07,599 INFO L227 lantSequenceWeakener]: Weakened 364 states. On average, predicates are now at 77.96% of their original sizes. [2019-10-02 20:41:07,599 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:41:07,667 INFO L420 sIntCurrentIteration]: We unified 366 AI predicates to 366 [2019-10-02 20:41:07,667 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:41:07,668 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:41:07,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-10-02 20:41:07,668 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:41:07,669 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:41:07,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:41:07,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:41:07,669 INFO L87 Difference]: Start difference. First operand 1490 states and 1929 transitions. Second operand 10 states. [2019-10-02 20:43:06,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:43:06,412 INFO L93 Difference]: Finished difference Result 1683 states and 2160 transitions. [2019-10-02 20:43:06,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-02 20:43:06,412 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 367 [2019-10-02 20:43:06,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:43:06,420 INFO L225 Difference]: With dead ends: 1683 [2019-10-02 20:43:06,421 INFO L226 Difference]: Without dead ends: 1683 [2019-10-02 20:43:06,421 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 20:43:06,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2019-10-02 20:43:06,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1676. [2019-10-02 20:43:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1676 states. [2019-10-02 20:43:06,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2153 transitions. [2019-10-02 20:43:06,457 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2153 transitions. Word has length 367 [2019-10-02 20:43:06,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:43:06,458 INFO L475 AbstractCegarLoop]: Abstraction has 1676 states and 2153 transitions. [2019-10-02 20:43:06,458 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 20:43:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2153 transitions. [2019-10-02 20:43:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2019-10-02 20:43:06,463 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:43:06,463 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:43:06,464 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:43:06,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:43:06,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1057390402, now seen corresponding path program 1 times [2019-10-02 20:43:06,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:43:06,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:43:06,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:43:06,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:43:06,466 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:43:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:43:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 350 proven. 157 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-10-02 20:43:06,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:43:06,852 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:43:06,852 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 426 with the following transitions: [2019-10-02 20:43:06,853 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:43:06,858 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:43:06,858 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:43:23,489 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:43:23,490 INFO L272 AbstractInterpreter]: Visited 120 different actions 358 times. Merged at 6 different actions 18 times. Never widened. Performed 656 root evaluator evaluations with a maximum evaluation depth of 13. Performed 656 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2019-10-02 20:43:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:43:23,490 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:43:27,497 INFO L227 lantSequenceWeakener]: Weakened 422 states. On average, predicates are now at 77.88% of their original sizes. [2019-10-02 20:43:27,497 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:43:27,565 INFO L420 sIntCurrentIteration]: We unified 424 AI predicates to 424 [2019-10-02 20:43:27,565 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:43:27,565 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:43:27,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 20:43:27,566 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:43:27,566 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:43:27,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:43:27,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:43:27,567 INFO L87 Difference]: Start difference. First operand 1676 states and 2153 transitions. Second operand 10 states. [2019-10-02 20:44:06,322 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:44:39,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:44:39,560 INFO L93 Difference]: Finished difference Result 1866 states and 2356 transitions. [2019-10-02 20:44:39,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 20:44:39,561 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 425 [2019-10-02 20:44:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:44:39,570 INFO L225 Difference]: With dead ends: 1866 [2019-10-02 20:44:39,570 INFO L226 Difference]: Without dead ends: 1866 [2019-10-02 20:44:39,574 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-02 20:44:39,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2019-10-02 20:44:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1862. [2019-10-02 20:44:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1862 states. [2019-10-02 20:44:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2352 transitions. [2019-10-02 20:44:39,614 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2352 transitions. Word has length 425 [2019-10-02 20:44:39,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:44:39,615 INFO L475 AbstractCegarLoop]: Abstraction has 1862 states and 2352 transitions. [2019-10-02 20:44:39,615 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 20:44:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2352 transitions. [2019-10-02 20:44:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2019-10-02 20:44:39,621 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:44:39,622 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:44:39,622 INFO L418 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:44:39,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:44:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash 132227544, now seen corresponding path program 1 times [2019-10-02 20:44:39,623 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:44:39,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:44:39,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:44:39,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:44:39,624 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:44:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:44:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 492 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-02 20:44:39,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:44:39,962 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:44:39,962 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 452 with the following transitions: [2019-10-02 20:44:39,963 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:44:39,966 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:44:39,966 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:44:56,138 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:45:12,030 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-02 20:45:12,031 INFO L272 AbstractInterpreter]: Visited 121 different actions 600 times. Merged at 7 different actions 38 times. Never widened. Performed 990 root evaluator evaluations with a maximum evaluation depth of 22. Performed 990 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 9 fixpoints after 3 different actions. Largest state had 24 variables. [2019-10-02 20:45:12,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:45:12,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-02 20:45:12,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:45:12,032 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 20:45:12,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:45:12,060 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-02 20:45:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:45:12,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 20:45:12,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 20:45:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 492 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-02 20:45:12,438 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-02 20:45:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 492 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-02 20:45:12,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-02 20:45:12,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2019-10-02 20:45:12,725 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-02 20:45:12,726 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:45:12,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:45:12,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-02 20:45:12,727 INFO L87 Difference]: Start difference. First operand 1862 states and 2352 transitions. Second operand 10 states. [2019-10-02 20:45:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:45:18,203 INFO L93 Difference]: Finished difference Result 3930 states and 4540 transitions. [2019-10-02 20:45:18,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-02 20:45:18,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 451 [2019-10-02 20:45:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:45:18,223 INFO L225 Difference]: With dead ends: 3930 [2019-10-02 20:45:18,223 INFO L226 Difference]: Without dead ends: 3562 [2019-10-02 20:45:18,225 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 920 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2019-10-02 20:45:18,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3562 states. [2019-10-02 20:45:18,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3562 to 2628. [2019-10-02 20:45:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2628 states. [2019-10-02 20:45:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 3091 transitions. [2019-10-02 20:45:18,296 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 3091 transitions. Word has length 451 [2019-10-02 20:45:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:45:18,297 INFO L475 AbstractCegarLoop]: Abstraction has 2628 states and 3091 transitions. [2019-10-02 20:45:18,297 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 20:45:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 3091 transitions. [2019-10-02 20:45:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2019-10-02 20:45:18,309 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:45:18,310 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:45:18,311 INFO L418 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:45:18,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:45:18,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1778848920, now seen corresponding path program 1 times [2019-10-02 20:45:18,311 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:45:18,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:45:18,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:45:18,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:45:18,314 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:45:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:45:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 641 proven. 435 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2019-10-02 20:45:19,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:45:19,402 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:45:19,403 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 575 with the following transitions: [2019-10-02 20:45:19,403 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [495], [499], [503], [507], [511], [515], [519], [523], [526], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:45:19,406 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:45:19,406 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:45:34,654 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:46:18,195 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-02 20:46:18,196 INFO L272 AbstractInterpreter]: Visited 124 different actions 846 times. Merged at 7 different actions 43 times. Widened at 1 different actions 2 times. Performed 1681 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1681 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 10 fixpoints after 2 different actions. Largest state had 24 variables. [2019-10-02 20:46:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:46:18,197 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-02 20:46:18,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:46:18,197 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-02 20:46:18,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:46:18,219 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-02 20:46:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:46:18,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-02 20:46:18,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 20:46:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2019-10-02 20:46:18,547 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-02 20:46:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2019-10-02 20:46:18,700 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:46:18,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [14] total 15 [2019-10-02 20:46:18,700 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:46:18,701 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 20:46:18,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 20:46:18,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-10-02 20:46:18,702 INFO L87 Difference]: Start difference. First operand 2628 states and 3091 transitions. Second operand 3 states. [2019-10-02 20:46:19,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:46:19,862 INFO L93 Difference]: Finished difference Result 3726 states and 4308 transitions. [2019-10-02 20:46:19,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 20:46:19,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 574 [2019-10-02 20:46:19,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:46:19,877 INFO L225 Difference]: With dead ends: 3726 [2019-10-02 20:46:19,877 INFO L226 Difference]: Without dead ends: 3726 [2019-10-02 20:46:19,877 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 1163 GetRequests, 1149 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-10-02 20:46:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2019-10-02 20:46:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 2804. [2019-10-02 20:46:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2804 states. [2019-10-02 20:46:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 3252 transitions. [2019-10-02 20:46:19,937 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 3252 transitions. Word has length 574 [2019-10-02 20:46:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:46:19,938 INFO L475 AbstractCegarLoop]: Abstraction has 2804 states and 3252 transitions. [2019-10-02 20:46:19,939 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 20:46:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 3252 transitions. [2019-10-02 20:46:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2019-10-02 20:46:19,948 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:46:19,949 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:46:19,949 INFO L418 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:46:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:46:19,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1408452979, now seen corresponding path program 1 times [2019-10-02 20:46:19,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:46:19,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:46:19,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:46:19,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:46:19,952 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:46:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:46:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 641 proven. 457 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-10-02 20:46:21,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:46:21,413 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:46:21,413 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 586 with the following transitions: [2019-10-02 20:46:21,413 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [495], [499], [503], [507], [511], [515], [519], [523], [526], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [638], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:46:21,416 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:46:21,416 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:46:36,729 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.