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/Problem18_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 22:44:49,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 22:44:49,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 22:44:49,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 22:44:49,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 22:44:49,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 22:44:49,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 22:44:49,329 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 22:44:49,355 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 22:44:49,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 22:44:49,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 22:44:49,357 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 22:44:49,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 22:44:49,358 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 22:44:49,358 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 22:44:49,358 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 22:44:49,358 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 22:44:49,359 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 22:44:49,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 22:44:49,361 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 22:44:49,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 22:44:49,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 22:44:49,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 22:44:49,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 22:44:49,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 22:44:49,362 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 22:44:49,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 22:44:49,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 22:44:49,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 22:44:49,363 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 22:44:49,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 22:44:49,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:44:49,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 22:44:49,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 22:44:49,364 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 22:44:49,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 22:44:49,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 22:44:49,364 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 22:44:49,403 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 22:44:49,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 22:44:49,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 22:44:49,419 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 22:44:49,419 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 22:44:49,420 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label52.c [2019-09-09 22:44:49,478 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca7d5f619/114addbe36e44d96a8cfd8159937c13a/FLAGd54194b2d [2019-09-09 22:44:50,161 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 22:44:50,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label52.c [2019-09-09 22:44:50,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca7d5f619/114addbe36e44d96a8cfd8159937c13a/FLAGd54194b2d [2019-09-09 22:44:50,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca7d5f619/114addbe36e44d96a8cfd8159937c13a [2019-09-09 22:44:50,353 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 22:44:50,355 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 22:44:50,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 22:44:50,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 22:44:50,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 22:44:50,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:44:50" (1/1) ... [2019-09-09 22:44:50,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc9efcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:44:50, skipping insertion in model container [2019-09-09 22:44:50,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:44:50" (1/1) ... [2019-09-09 22:44:50,375 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 22:44:50,515 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 22:44:51,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:44:51,747 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 22:44:52,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:44:52,573 INFO L192 MainTranslator]: Completed translation [2019-09-09 22:44:52,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:44:52 WrapperNode [2019-09-09 22:44:52,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 22:44:52,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 22:44:52,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 22:44:52,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 22:44:52,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:44:52" (1/1) ... [2019-09-09 22:44:52,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:44:52" (1/1) ... [2019-09-09 22:44:52,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:44:52" (1/1) ... [2019-09-09 22:44:52,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:44:52" (1/1) ... [2019-09-09 22:44:52,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:44:52" (1/1) ... [2019-09-09 22:44:52,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:44:52" (1/1) ... [2019-09-09 22:44:52,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:44:52" (1/1) ... [2019-09-09 22:44:52,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 22:44:52,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 22:44:52,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 22:44:52,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 22:44:52,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:44:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:44:52,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 22:44:52,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 22:44:52,930 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 22:44:52,930 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 22:44:52,931 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 22:44:52,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 22:44:52,931 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 22:44:52,931 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 22:44:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 22:44:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 22:44:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 22:44:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 22:44:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 22:44:52,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 22:44:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 22:44:56,769 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 22:44:56,769 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 22:44:56,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:44:56 BoogieIcfgContainer [2019-09-09 22:44:56,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 22:44:56,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 22:44:56,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 22:44:56,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 22:44:56,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 10:44:50" (1/3) ... [2019-09-09 22:44:56,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234f5efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:44:56, skipping insertion in model container [2019-09-09 22:44:56,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:44:52" (2/3) ... [2019-09-09 22:44:56,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234f5efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:44:56, skipping insertion in model container [2019-09-09 22:44:56,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:44:56" (3/3) ... [2019-09-09 22:44:56,780 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label52.c [2019-09-09 22:44:56,791 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 22:44:56,801 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 22:44:56,820 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 22:44:56,851 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 22:44:56,851 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 22:44:56,851 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 22:44:56,852 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 22:44:56,852 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 22:44:56,852 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 22:44:56,852 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 22:44:56,852 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 22:44:56,887 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 22:44:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-09 22:44:56,898 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:44:56,899 INFO L399 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] [2019-09-09 22:44:56,901 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:44:56,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:44:56,907 INFO L82 PathProgramCache]: Analyzing trace with hash -338918247, now seen corresponding path program 1 times [2019-09-09 22:44:56,910 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:44:56,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:44:56,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:44:56,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:44:56,970 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:44:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:44:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:44:57,179 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:44:57,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 22:44:57,179 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:44:57,185 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 22:44:57,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 22:44:57,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 22:44:57,204 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-09-09 22:45:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:45:04,665 INFO L93 Difference]: Finished difference Result 2202 states and 3439 transitions. [2019-09-09 22:45:04,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 22:45:04,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-09-09 22:45:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:45:04,709 INFO L225 Difference]: With dead ends: 2202 [2019-09-09 22:45:04,709 INFO L226 Difference]: Without dead ends: 2114 [2019-09-09 22:45:04,711 INFO L628 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 [2019-09-09 22:45:04,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-09-09 22:45:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2114. [2019-09-09 22:45:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2019-09-09 22:45:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3320 transitions. [2019-09-09 22:45:04,870 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3320 transitions. Word has length 22 [2019-09-09 22:45:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:45:04,871 INFO L475 AbstractCegarLoop]: Abstraction has 2114 states and 3320 transitions. [2019-09-09 22:45:04,871 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 22:45:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3320 transitions. [2019-09-09 22:45:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-09 22:45:04,875 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:45:04,876 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 22:45:04,876 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:45:04,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:45:04,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1998987061, now seen corresponding path program 1 times [2019-09-09 22:45:04,877 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:45:04,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:04,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:45:04,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:04,935 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:45:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:45:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:45:05,125 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:45:05,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 22:45:05,125 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:45:05,127 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 22:45:05,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 22:45:05,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 22:45:05,128 INFO L87 Difference]: Start difference. First operand 2114 states and 3320 transitions. Second operand 5 states. [2019-09-09 22:45:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:45:10,729 INFO L93 Difference]: Finished difference Result 4328 states and 6510 transitions. [2019-09-09 22:45:10,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:45:10,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2019-09-09 22:45:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:45:10,754 INFO L225 Difference]: With dead ends: 4328 [2019-09-09 22:45:10,754 INFO L226 Difference]: Without dead ends: 4328 [2019-09-09 22:45:10,755 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 22:45:10,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2019-09-09 22:45:10,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4296. [2019-09-09 22:45:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4296 states. [2019-09-09 22:45:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6416 transitions. [2019-09-09 22:45:10,881 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6416 transitions. Word has length 91 [2019-09-09 22:45:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:45:10,882 INFO L475 AbstractCegarLoop]: Abstraction has 4296 states and 6416 transitions. [2019-09-09 22:45:10,882 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 22:45:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6416 transitions. [2019-09-09 22:45:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-09 22:45:10,891 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:45:10,891 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-09-09 22:45:10,891 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:45:10,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:45:10,892 INFO L82 PathProgramCache]: Analyzing trace with hash 124623808, now seen corresponding path program 1 times [2019-09-09 22:45:10,893 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:45:10,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:10,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:45:10,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:10,895 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:45:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:45:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:45:11,097 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:45:11,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:45:11,097 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:45:11,097 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:45:11,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:45:11,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:45:11,098 INFO L87 Difference]: Start difference. First operand 4296 states and 6416 transitions. Second operand 6 states. [2019-09-09 22:45:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:45:16,449 INFO L93 Difference]: Finished difference Result 6539 states and 8489 transitions. [2019-09-09 22:45:16,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:45:16,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2019-09-09 22:45:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:45:16,479 INFO L225 Difference]: With dead ends: 6539 [2019-09-09 22:45:16,479 INFO L226 Difference]: Without dead ends: 6539 [2019-09-09 22:45:16,480 INFO L628 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 [2019-09-09 22:45:16,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2019-09-09 22:45:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6505. [2019-09-09 22:45:16,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6505 states. [2019-09-09 22:45:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 8361 transitions. [2019-09-09 22:45:16,619 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 8361 transitions. Word has length 118 [2019-09-09 22:45:16,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:45:16,620 INFO L475 AbstractCegarLoop]: Abstraction has 6505 states and 8361 transitions. [2019-09-09 22:45:16,620 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:45:16,620 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 8361 transitions. [2019-09-09 22:45:16,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-09 22:45:16,621 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:45:16,622 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:45:16,622 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:45:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:45:16,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1335867724, now seen corresponding path program 1 times [2019-09-09 22:45:16,623 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:45:16,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:16,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:45:16,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:16,624 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:45:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:45:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:45:16,756 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:45:16,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 22:45:16,757 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:45:16,758 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 22:45:16,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 22:45:16,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 22:45:16,760 INFO L87 Difference]: Start difference. First operand 6505 states and 8361 transitions. Second operand 4 states. [2019-09-09 22:45:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:45:21,982 INFO L93 Difference]: Finished difference Result 6505 states and 7877 transitions. [2019-09-09 22:45:21,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 22:45:21,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2019-09-09 22:45:21,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:45:22,018 INFO L225 Difference]: With dead ends: 6505 [2019-09-09 22:45:22,018 INFO L226 Difference]: Without dead ends: 6505 [2019-09-09 22:45:22,018 INFO L628 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 [2019-09-09 22:45:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6505 states. [2019-09-09 22:45:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6505 to 6505. [2019-09-09 22:45:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6505 states. [2019-09-09 22:45:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 7877 transitions. [2019-09-09 22:45:22,170 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 7877 transitions. Word has length 128 [2019-09-09 22:45:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:45:22,172 INFO L475 AbstractCegarLoop]: Abstraction has 6505 states and 7877 transitions. [2019-09-09 22:45:22,173 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 22:45:22,173 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 7877 transitions. [2019-09-09 22:45:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-09-09 22:45:22,178 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:45:22,179 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 22:45:22,179 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:45:22,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:45:22,180 INFO L82 PathProgramCache]: Analyzing trace with hash -273221022, now seen corresponding path program 1 times [2019-09-09 22:45:22,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:45:22,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:22,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:45:22,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:22,182 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:45:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:45:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-09 22:45:22,476 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:45:22,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 22:45:22,477 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:45:22,478 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 22:45:22,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 22:45:22,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 22:45:22,480 INFO L87 Difference]: Start difference. First operand 6505 states and 7877 transitions. Second operand 4 states. [2019-09-09 22:45:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:45:29,158 INFO L93 Difference]: Finished difference Result 19350 states and 23263 transitions. [2019-09-09 22:45:29,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 22:45:29,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 197 [2019-09-09 22:45:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:45:29,231 INFO L225 Difference]: With dead ends: 19350 [2019-09-09 22:45:29,231 INFO L226 Difference]: Without dead ends: 19350 [2019-09-09 22:45:29,232 INFO L628 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 [2019-09-09 22:45:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19350 states. [2019-09-09 22:45:29,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19350 to 17946. [2019-09-09 22:45:29,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17946 states. [2019-09-09 22:45:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17946 states to 17946 states and 21692 transitions. [2019-09-09 22:45:29,738 INFO L78 Accepts]: Start accepts. Automaton has 17946 states and 21692 transitions. Word has length 197 [2019-09-09 22:45:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:45:29,740 INFO L475 AbstractCegarLoop]: Abstraction has 17946 states and 21692 transitions. [2019-09-09 22:45:29,740 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 22:45:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 17946 states and 21692 transitions. [2019-09-09 22:45:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-09-09 22:45:29,745 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:45:29,745 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 22:45:29,745 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:45:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:45:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash -247448829, now seen corresponding path program 1 times [2019-09-09 22:45:29,746 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:45:29,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:29,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:45:29,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:29,750 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:45:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:45:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 30 proven. 84 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 22:45:30,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 22:45:30,182 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 22:45:30,183 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 217 with the following transitions: [2019-09-09 22:45:30,185 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1707], [1709], [1712], [1720], [1728], [1736], [1744], [1752], [1760], [1768], [1776], [1784], [1792], [1800], [1808], [1816], [1824], [1832], [1840], [1848], [1856], [1864], [1872], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2192], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2264], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 22:45:30,245 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 22:45:30,245 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 22:45:36,199 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 22:45:36,201 INFO L272 AbstractInterpreter]: Visited 111 different actions 111 times. Never merged. Never widened. Performed 261 root evaluator evaluations with a maximum evaluation depth of 13. Performed 261 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 22:45:36,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:45:36,206 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 22:45:41,995 INFO L227 lantSequenceWeakener]: Weakened 197 states. On average, predicates are now at 77.51% of their original sizes. [2019-09-09 22:45:41,995 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 22:45:42,070 INFO L420 sIntCurrentIteration]: We unified 215 AI predicates to 215 [2019-09-09 22:45:42,071 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 22:45:42,075 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 22:45:42,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2019-09-09 22:45:42,075 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:45:42,076 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 22:45:42,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 22:45:42,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 22:45:42,077 INFO L87 Difference]: Start difference. First operand 17946 states and 21692 transitions. Second operand 10 states. [2019-09-09 22:47:32,370 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.