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/Problem10_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:05:03,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:05:03,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:05:03,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:05:03,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 19:05:03,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 19:05:03,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 19:05:03,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 19:05:03,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 19:05:03,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 19:05:03,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 19:05:03,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 19:05:03,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 19:05:03,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 19:05:03,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 19:05:03,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 19:05:03,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 19:05:03,562 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 19:05:03,577 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:05:03,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:05:03,577 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:05:03,578 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:05:03,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:05:03,579 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:05:03,579 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:05:03,579 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:05:03,579 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:05:03,579 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:05:03,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:05:03,580 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:05:03,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:05:03,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:05:03,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:05:03,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:05:03,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:05:03,581 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:05:03,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:05:03,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:05:03,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:05:03,582 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:05:03,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:05:03,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:05:03,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:05:03,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:05:03,583 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:05:03,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:05:03,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:05:03,584 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:05:03,623 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:05:03,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:05:03,639 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:05:03,640 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:05:03,641 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:05:03,641 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label39.c [2019-10-02 19:05:03,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38da1f96e/25c85b487bdc4c0db2ef8c47c1c8f183/FLAGf148d908e [2019-10-02 19:05:04,197 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:05:04,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label39.c [2019-10-02 19:05:04,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38da1f96e/25c85b487bdc4c0db2ef8c47c1c8f183/FLAGf148d908e [2019-10-02 19:05:04,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38da1f96e/25c85b487bdc4c0db2ef8c47c1c8f183 [2019-10-02 19:05:04,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:05:04,490 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:05:04,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:05:04,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:05:04,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:05:04,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:05:04" (1/1) ... [2019-10-02 19:05:04,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b66671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:05:04, skipping insertion in model container [2019-10-02 19:05:04,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:05:04" (1/1) ... [2019-10-02 19:05:04,511 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:05:04,573 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:05:05,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:05:05,079 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:05:05,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:05:05,235 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:05:05,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:05:05 WrapperNode [2019-10-02 19:05:05,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:05:05,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:05:05,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:05:05,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:05:05,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:05:05" (1/1) ... [2019-10-02 19:05:05,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:05:05" (1/1) ... [2019-10-02 19:05:05,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:05:05" (1/1) ... [2019-10-02 19:05:05,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:05:05" (1/1) ... [2019-10-02 19:05:05,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:05:05" (1/1) ... [2019-10-02 19:05:05,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:05:05" (1/1) ... [2019-10-02 19:05:05,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:05:05" (1/1) ... [2019-10-02 19:05:05,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:05:05,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:05:05,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:05:05,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:05:05,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:05:05" (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 19:05:05,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:05:05,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:05:05,499 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:05:05,500 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:05:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:05:05,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:05:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:05:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:05:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:05:05,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:05:05,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:05:07,017 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:05:07,017 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:05:07,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:05:07 BoogieIcfgContainer [2019-10-02 19:05:07,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:05:07,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:05:07,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:05:07,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:05:07,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:05:04" (1/3) ... [2019-10-02 19:05:07,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60985e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:05:07, skipping insertion in model container [2019-10-02 19:05:07,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:05:05" (2/3) ... [2019-10-02 19:05:07,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60985e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:05:07, skipping insertion in model container [2019-10-02 19:05:07,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:05:07" (3/3) ... [2019-10-02 19:05:07,029 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label39.c [2019-10-02 19:05:07,039 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:05:07,048 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:05:07,065 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:05:07,096 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:05:07,097 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:05:07,097 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:05:07,097 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:05:07,098 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:05:07,098 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:05:07,098 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:05:07,098 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:05:07,119 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 19:05:07,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-02 19:05:07,128 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:05:07,129 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:05:07,131 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:05:07,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:05:07,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1917412719, now seen corresponding path program 1 times [2019-10-02 19:05:07,138 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:05:07,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:05:07,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:05:07,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:05:07,189 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:05:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:05:07,401 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 19:05:07,404 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:05:07,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:05:07,405 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:05:07,410 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:05:07,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:05:07,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:05:07,428 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-02 19:05:09,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:05:09,034 INFO L93 Difference]: Finished difference Result 524 states and 830 transitions. [2019-10-02 19:05:09,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:05:09,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-02 19:05:09,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:05:09,056 INFO L225 Difference]: With dead ends: 524 [2019-10-02 19:05:09,056 INFO L226 Difference]: Without dead ends: 437 [2019-10-02 19:05:09,058 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 19:05:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-02 19:05:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-10-02 19:05:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 19:05:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-02 19:05:09,126 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 32 [2019-10-02 19:05:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:05:09,127 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-02 19:05:09,127 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:05:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-02 19:05:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-02 19:05:09,132 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:05:09,132 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:09,133 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:05:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:05:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash 845536850, now seen corresponding path program 1 times [2019-10-02 19:05:09,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:05:09,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:05:09,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:05:09,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:05:09,135 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:05:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:05:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:05:09,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:05:09,485 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:05:09,486 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 103 with the following transitions: [2019-10-02 19:05:09,489 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [170], [178], [186], [194], [202], [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], [495], [498], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:05:09,554 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:05:09,554 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:05:13,959 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:05:21,055 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:05:21,058 INFO L272 AbstractInterpreter]: Visited 77 different actions 148 times. Merged at 4 different actions 4 times. Never widened. Performed 326 root evaluator evaluations with a maximum evaluation depth of 12. Performed 326 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:05:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:05:21,062 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:05:27,506 INFO L227 lantSequenceWeakener]: Weakened 99 states. On average, predicates are now at 73.13% of their original sizes. [2019-10-02 19:05:27,506 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:05:27,583 INFO L420 sIntCurrentIteration]: We unified 101 AI predicates to 101 [2019-10-02 19:05:27,583 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:05:27,584 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:05:27,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-10-02 19:05:27,585 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:05:27,586 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 19:05:27,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 19:05:27,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:05:27,587 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 10 states. [2019-10-02 19:10:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:10:38,669 INFO L93 Difference]: Finished difference Result 584 states and 755 transitions. [2019-10-02 19:10:38,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 19:10:38,670 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 102 [2019-10-02 19:10:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:10:38,674 INFO L225 Difference]: With dead ends: 584 [2019-10-02 19:10:38,674 INFO L226 Difference]: Without dead ends: 584 [2019-10-02 19:10:38,675 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-02 19:10:38,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-02 19:10:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2019-10-02 19:10:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-10-02 19:10:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 753 transitions. [2019-10-02 19:10:38,718 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 753 transitions. Word has length 102 [2019-10-02 19:10:38,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:10:38,719 INFO L475 AbstractCegarLoop]: Abstraction has 582 states and 753 transitions. [2019-10-02 19:10:38,719 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 19:10:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 753 transitions. [2019-10-02 19:10:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-02 19:10:38,732 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:10:38,734 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 19:10:38,735 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:10:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:10:38,735 INFO L82 PathProgramCache]: Analyzing trace with hash -616673326, now seen corresponding path program 1 times [2019-10-02 19:10:38,735 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:10:38,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:10:38,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:10:38,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:10:38,740 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:10:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:10:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-02 19:10:38,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:10:38,950 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:10:38,950 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 178 with the following transitions: [2019-10-02 19:10:38,950 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [170], [178], [186], [194], [202], [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], [495], [498], [499], [503], [507], [511], [515], [518], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:10:38,958 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:10:38,959 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:10:41,605 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:11:16,881 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:11:16,882 INFO L272 AbstractInterpreter]: Visited 83 different actions 241 times. Merged at 6 different actions 12 times. Never widened. Performed 580 root evaluator evaluations with a maximum evaluation depth of 16. Performed 580 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2019-10-02 19:11:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:11:16,882 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:11:34,614 INFO L227 lantSequenceWeakener]: Weakened 174 states. On average, predicates are now at 72.99% of their original sizes. [2019-10-02 19:11:34,614 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:11:34,700 INFO L420 sIntCurrentIteration]: We unified 176 AI predicates to 176 [2019-10-02 19:11:34,700 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:11:34,700 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:11:34,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-10-02 19:11:34,701 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:11:34,701 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 19:11:34,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 19:11:34,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:11:34,702 INFO L87 Difference]: Start difference. First operand 582 states and 753 transitions. Second operand 10 states. [2019-10-02 19:16:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:16:44,760 INFO L93 Difference]: Finished difference Result 737 states and 922 transitions. [2019-10-02 19:16:44,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 19:16:44,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 177 [2019-10-02 19:16:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:16:44,765 INFO L225 Difference]: With dead ends: 737 [2019-10-02 19:16:44,765 INFO L226 Difference]: Without dead ends: 737 [2019-10-02 19:16:44,766 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 19:16:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2019-10-02 19:16:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 727. [2019-10-02 19:16:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2019-10-02 19:16:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 910 transitions. [2019-10-02 19:16:44,790 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 910 transitions. Word has length 177 [2019-10-02 19:16:44,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:16:44,790 INFO L475 AbstractCegarLoop]: Abstraction has 727 states and 910 transitions. [2019-10-02 19:16:44,791 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 19:16:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 910 transitions. [2019-10-02 19:16:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-02 19:16:44,794 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:16:44,795 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:16:44,795 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:16:44,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:16:44,795 INFO L82 PathProgramCache]: Analyzing trace with hash -866122293, now seen corresponding path program 1 times [2019-10-02 19:16:44,796 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:16:44,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:16:44,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:16:44,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:16:44,797 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:16:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:16:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 51 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-02 19:16:45,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:16:45,024 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:16:45,024 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 193 with the following transitions: [2019-10-02 19:16:45,025 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [170], [178], [186], [194], [202], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [542], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:16:45,030 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:16:45,031 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:16:55,617 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:17:09,127 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:17:09,127 INFO L272 AbstractInterpreter]: Visited 89 different actions 171 times. Merged at 3 different actions 3 times. Never widened. Performed 305 root evaluator evaluations with a maximum evaluation depth of 16. Performed 305 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:17:09,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:17:09,128 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:17:28,830 INFO L227 lantSequenceWeakener]: Weakened 189 states. On average, predicates are now at 72.97% of their original sizes. [2019-10-02 19:17:28,831 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:17:28,916 INFO L420 sIntCurrentIteration]: We unified 191 AI predicates to 191 [2019-10-02 19:17:28,916 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:17:28,916 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:17:28,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-10-02 19:17:28,917 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:17:28,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 19:17:28,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 19:17:28,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 19:17:28,918 INFO L87 Difference]: Start difference. First operand 727 states and 910 transitions. Second operand 11 states.