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/Problem15_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 21:01:24,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 21:01:24,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 21:01:24,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 21:01:24,786 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 21:01:24,801 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 21:01:24,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 21:01:24,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 21:01:24,802 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 21:01:24,802 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 21:01:24,802 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 21:01:24,803 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 21:01:24,803 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 21:01:24,803 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 21:01:24,803 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 21:01:24,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 21:01:24,804 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 21:01:24,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 21:01:24,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 21:01:24,805 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 21:01:24,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 21:01:24,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 21:01:24,805 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 21:01:24,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 21:01:24,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 21:01:24,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 21:01:24,806 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 21:01:24,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 21:01:24,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:01:24,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 21:01:24,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 21:01:24,807 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 21:01:24,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 21:01:24,807 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 21:01:24,807 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 21:01:24,836 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 21:01:24,848 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 21:01:24,851 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 21:01:24,852 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 21:01:24,852 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 21:01:24,853 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label33.c [2019-10-02 21:01:24,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1cdca484/e9b6d2d4832348cd897206133285a481/FLAG9f6b8c43e [2019-10-02 21:01:25,566 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 21:01:25,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label33.c [2019-10-02 21:01:25,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1cdca484/e9b6d2d4832348cd897206133285a481/FLAG9f6b8c43e [2019-10-02 21:01:25,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1cdca484/e9b6d2d4832348cd897206133285a481 [2019-10-02 21:01:25,771 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 21:01:25,773 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 21:01:25,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 21:01:25,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 21:01:25,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 21:01:25,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:01:25" (1/1) ... [2019-10-02 21:01:25,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ce2b1cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:01:25, skipping insertion in model container [2019-10-02 21:01:25,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:01:25" (1/1) ... [2019-10-02 21:01:25,795 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 21:01:25,871 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 21:01:26,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:01:26,776 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 21:01:27,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:01:27,173 INFO L192 MainTranslator]: Completed translation [2019-10-02 21:01:27,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:01:27 WrapperNode [2019-10-02 21:01:27,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 21:01:27,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 21:01:27,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 21:01:27,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 21:01:27,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:01:27" (1/1) ... [2019-10-02 21:01:27,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:01:27" (1/1) ... [2019-10-02 21:01:27,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:01:27" (1/1) ... [2019-10-02 21:01:27,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:01:27" (1/1) ... [2019-10-02 21:01:27,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:01:27" (1/1) ... [2019-10-02 21:01:27,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:01:27" (1/1) ... [2019-10-02 21:01:27,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:01:27" (1/1) ... [2019-10-02 21:01:27,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 21:01:27,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 21:01:27,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 21:01:27,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 21:01:27,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:01:27" (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 21:01:27,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 21:01:27,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 21:01:27,480 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 21:01:27,480 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 21:01:27,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 21:01:27,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 21:01:27,481 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 21:01:27,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 21:01:27,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 21:01:27,482 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 21:01:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 21:01:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 21:01:27,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 21:01:31,870 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 21:01:31,871 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 21:01:31,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:01:31 BoogieIcfgContainer [2019-10-02 21:01:31,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 21:01:31,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 21:01:31,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 21:01:31,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 21:01:31,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 09:01:25" (1/3) ... [2019-10-02 21:01:31,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585f1a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:01:31, skipping insertion in model container [2019-10-02 21:01:31,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:01:27" (2/3) ... [2019-10-02 21:01:31,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585f1a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:01:31, skipping insertion in model container [2019-10-02 21:01:31,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:01:31" (3/3) ... [2019-10-02 21:01:31,883 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label33.c [2019-10-02 21:01:31,894 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 21:01:31,906 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 21:01:31,924 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 21:01:31,959 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 21:01:31,960 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 21:01:31,960 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 21:01:31,960 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 21:01:31,960 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 21:01:31,960 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 21:01:31,960 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 21:01:31,961 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 21:01:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-02 21:01:32,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-02 21:01:32,048 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:01:32,049 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] [2019-10-02 21:01:32,052 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:01:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:01:32,059 INFO L82 PathProgramCache]: Analyzing trace with hash 726540760, now seen corresponding path program 1 times [2019-10-02 21:01:32,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:01:32,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:01:32,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:01:32,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:01:32,118 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:01:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:01:32,397 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 21:01:32,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:01:32,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 21:01:32,400 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:01:32,406 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 21:01:32,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 21:01:32,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:01:32,423 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-02 21:01:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:01:36,972 INFO L93 Difference]: Finished difference Result 1115 states and 1741 transitions. [2019-10-02 21:01:36,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 21:01:36,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-10-02 21:01:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:01:37,003 INFO L225 Difference]: With dead ends: 1115 [2019-10-02 21:01:37,004 INFO L226 Difference]: Without dead ends: 1028 [2019-10-02 21:01:37,005 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:01:37,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2019-10-02 21:01:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 700. [2019-10-02 21:01:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-10-02 21:01:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1110 transitions. [2019-10-02 21:01:37,115 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1110 transitions. Word has length 28 [2019-10-02 21:01:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:01:37,116 INFO L475 AbstractCegarLoop]: Abstraction has 700 states and 1110 transitions. [2019-10-02 21:01:37,117 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 21:01:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1110 transitions. [2019-10-02 21:01:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-02 21:01:37,124 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:01:37,125 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, 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 21:01:37,125 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:01:37,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:01:37,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1804858835, now seen corresponding path program 1 times [2019-10-02 21:01:37,127 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:01:37,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:01:37,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:01:37,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:01:37,130 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:01:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:01:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:01:37,369 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:01:37,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 21:01:37,369 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:01:37,371 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 21:01:37,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 21:01:37,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 21:01:37,374 INFO L87 Difference]: Start difference. First operand 700 states and 1110 transitions. Second operand 5 states. [2019-10-02 21:01:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:01:42,084 INFO L93 Difference]: Finished difference Result 1363 states and 1890 transitions. [2019-10-02 21:01:42,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 21:01:42,087 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2019-10-02 21:01:42,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:01:42,133 INFO L225 Difference]: With dead ends: 1363 [2019-10-02 21:01:42,134 INFO L226 Difference]: Without dead ends: 1363 [2019-10-02 21:01:42,135 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 21:01:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2019-10-02 21:01:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1333. [2019-10-02 21:01:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2019-10-02 21:01:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1846 transitions. [2019-10-02 21:01:42,191 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1846 transitions. Word has length 100 [2019-10-02 21:01:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:01:42,192 INFO L475 AbstractCegarLoop]: Abstraction has 1333 states and 1846 transitions. [2019-10-02 21:01:42,192 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 21:01:42,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1846 transitions. [2019-10-02 21:01:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-02 21:01:42,195 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:01:42,195 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, 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 21:01:42,195 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:01:42,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:01:42,196 INFO L82 PathProgramCache]: Analyzing trace with hash 278762691, now seen corresponding path program 1 times [2019-10-02 21:01:42,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:01:42,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:01:42,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:01:42,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:01:42,199 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:01:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:01:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:01:42,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:01:42,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 21:01:42,416 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:01:42,417 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 21:01:42,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 21:01:42,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 21:01:42,418 INFO L87 Difference]: Start difference. First operand 1333 states and 1846 transitions. Second operand 5 states. [2019-10-02 21:01:48,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:01:48,711 INFO L93 Difference]: Finished difference Result 4463 states and 6074 transitions. [2019-10-02 21:01:48,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-02 21:01:48,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-10-02 21:01:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:01:48,740 INFO L225 Difference]: With dead ends: 4463 [2019-10-02 21:01:48,740 INFO L226 Difference]: Without dead ends: 4463 [2019-10-02 21:01:48,741 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-02 21:01:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2019-10-02 21:01:48,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 4446. [2019-10-02 21:01:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4446 states. [2019-10-02 21:01:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4446 states to 4446 states and 6041 transitions. [2019-10-02 21:01:48,860 INFO L78 Accepts]: Start accepts. Automaton has 4446 states and 6041 transitions. Word has length 108 [2019-10-02 21:01:48,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:01:48,860 INFO L475 AbstractCegarLoop]: Abstraction has 4446 states and 6041 transitions. [2019-10-02 21:01:48,861 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 21:01:48,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4446 states and 6041 transitions. [2019-10-02 21:01:48,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-02 21:01:48,867 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:01:48,867 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, 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] [2019-10-02 21:01:48,867 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:01:48,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:01:48,868 INFO L82 PathProgramCache]: Analyzing trace with hash -309550926, now seen corresponding path program 1 times [2019-10-02 21:01:48,868 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:01:48,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:01:48,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:01:48,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:01:48,870 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:01:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:01:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-02 21:01:49,019 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:01:49,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 21:01:49,020 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:01:49,020 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 21:01:49,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 21:01:49,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:01:49,021 INFO L87 Difference]: Start difference. First operand 4446 states and 6041 transitions. Second operand 4 states. [2019-10-02 21:01:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:01:52,987 INFO L93 Difference]: Finished difference Result 12469 states and 16257 transitions. [2019-10-02 21:01:52,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 21:01:52,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 186 [2019-10-02 21:01:52,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:01:53,070 INFO L225 Difference]: With dead ends: 12469 [2019-10-02 21:01:53,071 INFO L226 Difference]: Without dead ends: 12469 [2019-10-02 21:01:53,071 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:01:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12469 states. [2019-10-02 21:01:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12469 to 10621. [2019-10-02 21:01:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10621 states. [2019-10-02 21:01:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10621 states to 10621 states and 14179 transitions. [2019-10-02 21:01:53,473 INFO L78 Accepts]: Start accepts. Automaton has 10621 states and 14179 transitions. Word has length 186 [2019-10-02 21:01:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:01:53,474 INFO L475 AbstractCegarLoop]: Abstraction has 10621 states and 14179 transitions. [2019-10-02 21:01:53,474 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 21:01:53,475 INFO L276 IsEmpty]: Start isEmpty. Operand 10621 states and 14179 transitions. [2019-10-02 21:01:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2019-10-02 21:01:53,488 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:01:53,488 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, 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, 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, 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] [2019-10-02 21:01:53,489 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:01:53,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:01:53,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1298691159, now seen corresponding path program 1 times [2019-10-02 21:01:53,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:01:53,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:01:53,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:01:53,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:01:53,492 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:01:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:01:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-10-02 21:01:54,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:01:54,269 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:01:54,271 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 422 with the following transitions: [2019-10-02 21:01:54,274 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [205], [207], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1167], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1209], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-10-02 21:01:54,372 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:01:54,372 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:02:05,203 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:02:05,206 INFO L272 AbstractInterpreter]: Visited 205 different actions 205 times. Never merged. Never widened. Performed 449 root evaluator evaluations with a maximum evaluation depth of 14. Performed 449 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 21:02:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:02:05,212 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:02:19,444 INFO L227 lantSequenceWeakener]: Weakened 402 states. On average, predicates are now at 77.46% of their original sizes. [2019-10-02 21:02:19,444 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:02:19,565 INFO L420 sIntCurrentIteration]: We unified 420 AI predicates to 420 [2019-10-02 21:02:19,566 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:02:19,567 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:02:19,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2019-10-02 21:02:19,567 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:02:19,568 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 21:02:19,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 21:02:19,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-02 21:02:19,569 INFO L87 Difference]: Start difference. First operand 10621 states and 14179 transitions. Second operand 11 states. [2019-10-02 21:02:28,402 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.