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/Problem13_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:32:19,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:32:19,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:32:19,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:32:19,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:32:19,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:32:19,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:32:19,583 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 17:32:19,598 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:32:19,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:32:19,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:32:19,599 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:32:19,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:32:19,599 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:32:19,600 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:32:19,600 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:32:19,600 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:32:19,600 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:32:19,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:32:19,601 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:32:19,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:32:19,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:32:19,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:32:19,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:32:19,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:32:19,602 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:32:19,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:32:19,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:32:19,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:32:19,603 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:32:19,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:32:19,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:32:19,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:32:19,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:32:19,604 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:32:19,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:32:19,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:32:19,605 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:32:19,633 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:32:19,644 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:32:19,648 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:32:19,649 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:32:19,649 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:32:19,650 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label37.c [2019-09-09 17:32:19,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25d0f072a/a01529e97cf14087bcc480a4819f2301/FLAG511e29713 [2019-09-09 17:32:20,512 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:32:20,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label37.c [2019-09-09 17:32:20,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25d0f072a/a01529e97cf14087bcc480a4819f2301/FLAG511e29713 [2019-09-09 17:32:21,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25d0f072a/a01529e97cf14087bcc480a4819f2301 [2019-09-09 17:32:21,059 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:32:21,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:32:21,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:32:21,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:32:21,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:32:21,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:32:21" (1/1) ... [2019-09-09 17:32:21,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a64957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:21, skipping insertion in model container [2019-09-09 17:32:21,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:32:21" (1/1) ... [2019-09-09 17:32:21,077 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:32:21,249 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:32:23,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:32:23,103 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:32:23,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:32:23,861 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:32:23,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:23 WrapperNode [2019-09-09 17:32:23,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:32:23,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:32:23,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:32:23,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:32:23,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:23" (1/1) ... [2019-09-09 17:32:23,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:23" (1/1) ... [2019-09-09 17:32:23,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:23" (1/1) ... [2019-09-09 17:32:23,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:23" (1/1) ... [2019-09-09 17:32:24,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:23" (1/1) ... [2019-09-09 17:32:24,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:23" (1/1) ... [2019-09-09 17:32:24,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:23" (1/1) ... [2019-09-09 17:32:24,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:32:24,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:32:24,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:32:24,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:32:24,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:23" (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 17:32:24,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:32:24,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:32:24,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:32:24,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:32:24,283 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:32:24,283 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:32:24,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:32:24,283 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:32:24,283 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:32:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:32:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:32:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:32:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:32:24,286 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:32:24,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:32:24,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:32:24,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:32:30,129 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:32:30,130 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:32:30,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:32:30 BoogieIcfgContainer [2019-09-09 17:32:30,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:32:30,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:32:30,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:32:30,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:32:30,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:32:21" (1/3) ... [2019-09-09 17:32:30,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cbde8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:32:30, skipping insertion in model container [2019-09-09 17:32:30,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:23" (2/3) ... [2019-09-09 17:32:30,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cbde8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:32:30, skipping insertion in model container [2019-09-09 17:32:30,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:32:30" (3/3) ... [2019-09-09 17:32:30,151 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label37.c [2019-09-09 17:32:30,166 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:32:30,178 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:32:30,196 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:32:30,227 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:32:30,228 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:32:30,228 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:32:30,228 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:32:30,228 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:32:30,228 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:32:30,229 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:32:30,229 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:32:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:32:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-09 17:32:30,405 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:32:30,407 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:32:30,410 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:32:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:32:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash -49259937, now seen corresponding path program 1 times [2019-09-09 17:32:30,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:32:30,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:30,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:32:30,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:30,473 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:32:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:32:30,855 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 17:32:30,858 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:32:30,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:32:30,858 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:32:30,864 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:32:30,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:32:30,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:32:30,883 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 3 states. [2019-09-09 17:32:37,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:32:37,464 INFO L93 Difference]: Finished difference Result 1971 states and 3470 transitions. [2019-09-09 17:32:37,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:32:37,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2019-09-09 17:32:37,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:32:37,508 INFO L225 Difference]: With dead ends: 1971 [2019-09-09 17:32:37,508 INFO L226 Difference]: Without dead ends: 1903 [2019-09-09 17:32:37,511 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:32:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2019-09-09 17:32:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1897. [2019-09-09 17:32:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2019-09-09 17:32:37,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 3341 transitions. [2019-09-09 17:32:37,670 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 3341 transitions. Word has length 60 [2019-09-09 17:32:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:32:37,671 INFO L475 AbstractCegarLoop]: Abstraction has 1897 states and 3341 transitions. [2019-09-09 17:32:37,671 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:32:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 3341 transitions. [2019-09-09 17:32:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-09 17:32:37,679 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:32:37,680 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:32:37,680 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:32:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:32:37,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1388222269, now seen corresponding path program 1 times [2019-09-09 17:32:37,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:32:37,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:37,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:32:37,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:37,684 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:32:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:32:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:32:37,948 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:32:37,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:32:37,948 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:32:37,950 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:32:37,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:32:37,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:32:37,951 INFO L87 Difference]: Start difference. First operand 1897 states and 3341 transitions. Second operand 6 states. [2019-09-09 17:32:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:32:45,703 INFO L93 Difference]: Finished difference Result 3615 states and 5738 transitions. [2019-09-09 17:32:45,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:32:45,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-09-09 17:32:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:32:45,726 INFO L225 Difference]: With dead ends: 3615 [2019-09-09 17:32:45,727 INFO L226 Difference]: Without dead ends: 3615 [2019-09-09 17:32:45,728 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 17:32:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2019-09-09 17:32:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3586. [2019-09-09 17:32:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3586 states. [2019-09-09 17:32:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 5675 transitions. [2019-09-09 17:32:45,869 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 5675 transitions. Word has length 136 [2019-09-09 17:32:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:32:45,871 INFO L475 AbstractCegarLoop]: Abstraction has 3586 states and 5675 transitions. [2019-09-09 17:32:45,872 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:32:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 5675 transitions. [2019-09-09 17:32:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-09 17:32:45,882 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:32:45,883 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:32:45,884 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:32:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:32:45,885 INFO L82 PathProgramCache]: Analyzing trace with hash 185855539, now seen corresponding path program 1 times [2019-09-09 17:32:45,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:32:45,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:45,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:32:45,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:45,888 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:32:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:32:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:32:46,069 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:32:46,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:32:46,070 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:32:46,071 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:32:46,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:32:46,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:32:46,072 INFO L87 Difference]: Start difference. First operand 3586 states and 5675 transitions. Second operand 6 states. [2019-09-09 17:32:53,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:32:53,487 INFO L93 Difference]: Finished difference Result 7095 states and 10740 transitions. [2019-09-09 17:32:53,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:32:53,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-09-09 17:32:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:32:53,532 INFO L225 Difference]: With dead ends: 7095 [2019-09-09 17:32:53,532 INFO L226 Difference]: Without dead ends: 7095 [2019-09-09 17:32:53,533 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 17:32:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7095 states. [2019-09-09 17:32:53,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7095 to 7042. [2019-09-09 17:32:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7042 states. [2019-09-09 17:32:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7042 states to 7042 states and 10530 transitions. [2019-09-09 17:32:53,804 INFO L78 Accepts]: Start accepts. Automaton has 7042 states and 10530 transitions. Word has length 155 [2019-09-09 17:32:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:32:53,806 INFO L475 AbstractCegarLoop]: Abstraction has 7042 states and 10530 transitions. [2019-09-09 17:32:53,806 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:32:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 7042 states and 10530 transitions. [2019-09-09 17:32:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-09-09 17:32:53,810 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:32:53,810 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:32:53,811 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:32:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:32:53,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1788669083, now seen corresponding path program 1 times [2019-09-09 17:32:53,812 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:32:53,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:53,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:32:53,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:32:53,814 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:32:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:32:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:32:54,022 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:32:54,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:32:54,022 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:32:54,023 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:32:54,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:32:54,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:32:54,024 INFO L87 Difference]: Start difference. First operand 7042 states and 10530 transitions. Second operand 6 states. [2019-09-09 17:33:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:33:01,937 INFO L93 Difference]: Finished difference Result 10950 states and 16424 transitions. [2019-09-09 17:33:01,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:33:01,938 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 167 [2019-09-09 17:33:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:33:01,995 INFO L225 Difference]: With dead ends: 10950 [2019-09-09 17:33:01,996 INFO L226 Difference]: Without dead ends: 10950 [2019-09-09 17:33:01,997 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 17:33:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2019-09-09 17:33:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 10780. [2019-09-09 17:33:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10780 states. [2019-09-09 17:33:02,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10780 states to 10780 states and 15827 transitions. [2019-09-09 17:33:02,359 INFO L78 Accepts]: Start accepts. Automaton has 10780 states and 15827 transitions. Word has length 167 [2019-09-09 17:33:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:33:02,361 INFO L475 AbstractCegarLoop]: Abstraction has 10780 states and 15827 transitions. [2019-09-09 17:33:02,361 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:33:02,362 INFO L276 IsEmpty]: Start isEmpty. Operand 10780 states and 15827 transitions. [2019-09-09 17:33:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-09-09 17:33:02,368 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:33:02,369 INFO L399 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, 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] [2019-09-09 17:33:02,369 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:33:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:33:02,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2130048317, now seen corresponding path program 1 times [2019-09-09 17:33:02,370 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:33:02,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:02,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:33:02,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:02,372 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:33:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:33:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 106 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 17:33:02,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:33:02,556 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:33:02,557 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 222 with the following transitions: [2019-09-09 17:33:02,560 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2955], [2963], [2971], [2979], [2987], [2995], [3003], [3011], [3015], [3017], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3128], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3225], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:33:02,613 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:33:02,613 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:33:33,486 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:33:33,488 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Performed 136 root evaluator evaluations with a maximum evaluation depth of 17. Performed 136 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:33:33,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:33:33,492 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:34:06,288 INFO L227 lantSequenceWeakener]: Weakened 212 states. On average, predicates are now at 71.47% of their original sizes. [2019-09-09 17:34:06,288 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:34:06,331 INFO L420 sIntCurrentIteration]: We unified 220 AI predicates to 220 [2019-09-09 17:34:06,331 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:34:06,332 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:34:06,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2019-09-09 17:34:06,333 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:34:06,334 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 17:34:06,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 17:34:06,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 17:34:06,335 INFO L87 Difference]: Start difference. First operand 10780 states and 15827 transitions. Second operand 7 states. [2019-09-09 17:36:55,528 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.