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/Problem16_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:51:30,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:51:30,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:51:30,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:51:30,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 19:51:30,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 19:51:30,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 19:51:30,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 19:51:30,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 19:51:30,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 19:51:30,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 19:51:30,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 19:51:30,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 19:51:30,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 19:51:30,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 19:51:30,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 19:51:30,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 19:51:30,985 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 19:51:31,008 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:51:31,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:51:31,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:51:31,009 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:51:31,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:51:31,010 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:51:31,010 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:51:31,011 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:51:31,011 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:51:31,011 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:51:31,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:51:31,014 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:51:31,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:51:31,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:51:31,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:51:31,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:51:31,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:51:31,015 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:51:31,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:51:31,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:51:31,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:51:31,016 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:51:31,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:51:31,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:51:31,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:51:31,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:51:31,017 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:51:31,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:51:31,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:51:31,018 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:51:31,074 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:51:31,095 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:51:31,100 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:51:31,101 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:51:31,102 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:51:31,103 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label04.c [2019-09-09 19:51:31,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a1a0697f/df1ba8f0cd6b4df3958ba69da4da49ed/FLAG7953d158f [2019-09-09 19:51:31,850 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:51:31,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label04.c [2019-09-09 19:51:31,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a1a0697f/df1ba8f0cd6b4df3958ba69da4da49ed/FLAG7953d158f [2019-09-09 19:51:32,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a1a0697f/df1ba8f0cd6b4df3958ba69da4da49ed [2019-09-09 19:51:32,146 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:51:32,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:51:32,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:51:32,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:51:32,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:51:32,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:51:32" (1/1) ... [2019-09-09 19:51:32,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@335c662c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:51:32, skipping insertion in model container [2019-09-09 19:51:32,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:51:32" (1/1) ... [2019-09-09 19:51:32,171 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:51:32,264 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:51:33,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:51:33,301 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:51:33,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:51:33,609 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:51:33,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:51:33 WrapperNode [2019-09-09 19:51:33,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:51:33,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:51:33,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:51:33,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:51:33,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:51:33" (1/1) ... [2019-09-09 19:51:33,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:51:33" (1/1) ... [2019-09-09 19:51:33,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:51:33" (1/1) ... [2019-09-09 19:51:33,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:51:33" (1/1) ... [2019-09-09 19:51:33,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:51:33" (1/1) ... [2019-09-09 19:51:33,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:51:33" (1/1) ... [2019-09-09 19:51:33,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:51:33" (1/1) ... [2019-09-09 19:51:33,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:51:33,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:51:33,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:51:33,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:51:33,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:51:33" (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 19:51:33,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:51:33,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:51:33,898 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:51:33,899 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:51:33,899 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:51:33,899 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:51:33,899 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:51:33,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:51:33,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:51:33,900 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:51:33,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:51:33,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:51:33,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:51:36,228 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:51:36,228 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:51:36,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:51:36 BoogieIcfgContainer [2019-09-09 19:51:36,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:51:36,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:51:36,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:51:36,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:51:36,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:51:32" (1/3) ... [2019-09-09 19:51:36,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c88d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:51:36, skipping insertion in model container [2019-09-09 19:51:36,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:51:33" (2/3) ... [2019-09-09 19:51:36,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c88d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:51:36, skipping insertion in model container [2019-09-09 19:51:36,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:51:36" (3/3) ... [2019-09-09 19:51:36,238 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label04.c [2019-09-09 19:51:36,250 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:51:36,263 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:51:36,282 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:51:36,313 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:51:36,313 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:51:36,313 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:51:36,313 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:51:36,313 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:51:36,314 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:51:36,314 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:51:36,314 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:51:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 19:51:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-09 19:51:36,371 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:51:36,372 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] [2019-09-09 19:51:36,374 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:51:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:51:36,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1941873075, now seen corresponding path program 1 times [2019-09-09 19:51:36,383 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:51:36,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:36,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:51:36,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:36,441 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:51:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:51:36,705 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 19:51:36,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:51:36,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 19:51:36,708 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:51:36,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 19:51:36,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 19:51:36,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 19:51:36,732 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-09-09 19:51:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:51:39,295 INFO L93 Difference]: Finished difference Result 750 states and 1263 transitions. [2019-09-09 19:51:39,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 19:51:39,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-09-09 19:51:39,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:51:39,320 INFO L225 Difference]: With dead ends: 750 [2019-09-09 19:51:39,321 INFO L226 Difference]: Without dead ends: 682 [2019-09-09 19:51:39,322 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 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 19:51:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-09-09 19:51:39,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-09-09 19:51:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 19:51:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1154 transitions. [2019-09-09 19:51:39,426 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1154 transitions. Word has length 34 [2019-09-09 19:51:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:51:39,427 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1154 transitions. [2019-09-09 19:51:39,427 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 19:51:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1154 transitions. [2019-09-09 19:51:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-09 19:51:39,432 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:51:39,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:51:39,433 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:51:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:51:39,433 INFO L82 PathProgramCache]: Analyzing trace with hash 749760789, now seen corresponding path program 1 times [2019-09-09 19:51:39,434 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:51:39,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:39,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:51:39,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:39,435 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:51:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:51:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:51:39,616 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:51:39,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:51:39,616 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:51:39,618 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:51:39,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:51:39,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:51:39,619 INFO L87 Difference]: Start difference. First operand 682 states and 1154 transitions. Second operand 6 states. [2019-09-09 19:51:45,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:51:45,641 INFO L93 Difference]: Finished difference Result 2132 states and 3535 transitions. [2019-09-09 19:51:45,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 19:51:45,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-09-09 19:51:45,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:51:45,660 INFO L225 Difference]: With dead ends: 2132 [2019-09-09 19:51:45,661 INFO L226 Difference]: Without dead ends: 2132 [2019-09-09 19:51:45,662 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 19:51:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2019-09-09 19:51:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2087. [2019-09-09 19:51:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2087 states. [2019-09-09 19:51:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3381 transitions. [2019-09-09 19:51:45,759 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3381 transitions. Word has length 109 [2019-09-09 19:51:45,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:51:45,760 INFO L475 AbstractCegarLoop]: Abstraction has 2087 states and 3381 transitions. [2019-09-09 19:51:45,761 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:51:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3381 transitions. [2019-09-09 19:51:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-09 19:51:45,763 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:51:45,764 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:51:45,764 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:51:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:51:45,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2056754483, now seen corresponding path program 1 times [2019-09-09 19:51:45,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:51:45,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:45,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:51:45,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:45,767 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:51:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:51:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:51:45,894 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:51:45,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:51:45,894 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:51:45,895 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:51:45,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:51:45,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:51:45,896 INFO L87 Difference]: Start difference. First operand 2087 states and 3381 transitions. Second operand 6 states. [2019-09-09 19:51:48,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:51:48,749 INFO L93 Difference]: Finished difference Result 3542 states and 5895 transitions. [2019-09-09 19:51:48,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-09 19:51:48,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2019-09-09 19:51:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:51:48,782 INFO L225 Difference]: With dead ends: 3542 [2019-09-09 19:51:48,784 INFO L226 Difference]: Without dead ends: 3542 [2019-09-09 19:51:48,787 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-09 19:51:48,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2019-09-09 19:51:48,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3503. [2019-09-09 19:51:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3503 states. [2019-09-09 19:51:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 5697 transitions. [2019-09-09 19:51:48,936 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 5697 transitions. Word has length 113 [2019-09-09 19:51:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:51:48,939 INFO L475 AbstractCegarLoop]: Abstraction has 3503 states and 5697 transitions. [2019-09-09 19:51:48,939 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:51:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 5697 transitions. [2019-09-09 19:51:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-09 19:51:48,946 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:51:48,947 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:51:48,947 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:51:48,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:51:48,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1748569001, now seen corresponding path program 1 times [2019-09-09 19:51:48,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:51:48,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:48,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:51:48,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:48,949 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:51:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:51:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:51:49,179 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:51:49,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:51:49,180 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:51:49,180 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:51:49,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:51:49,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:51:49,181 INFO L87 Difference]: Start difference. First operand 3503 states and 5697 transitions. Second operand 6 states. [2019-09-09 19:51:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:51:52,178 INFO L93 Difference]: Finished difference Result 4320 states and 7018 transitions. [2019-09-09 19:51:52,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:51:52,179 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2019-09-09 19:51:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:51:52,212 INFO L225 Difference]: With dead ends: 4320 [2019-09-09 19:51:52,212 INFO L226 Difference]: Without dead ends: 4320 [2019-09-09 19:51:52,213 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 19:51:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2019-09-09 19:51:52,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 4279. [2019-09-09 19:51:52,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4279 states. [2019-09-09 19:51:52,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4279 states to 4279 states and 6768 transitions. [2019-09-09 19:51:52,383 INFO L78 Accepts]: Start accepts. Automaton has 4279 states and 6768 transitions. Word has length 115 [2019-09-09 19:51:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:51:52,384 INFO L475 AbstractCegarLoop]: Abstraction has 4279 states and 6768 transitions. [2019-09-09 19:51:52,384 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:51:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4279 states and 6768 transitions. [2019-09-09 19:51:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-09 19:51:52,387 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:51:52,387 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:51:52,387 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:51:52,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:51:52,388 INFO L82 PathProgramCache]: Analyzing trace with hash 567001872, now seen corresponding path program 1 times [2019-09-09 19:51:52,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:51:52,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:52,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:51:52,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:52,390 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:51:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:51:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:51:52,491 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:51:52,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:51:52,492 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:51:52,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:51:52,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:51:52,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:51:52,493 INFO L87 Difference]: Start difference. First operand 4279 states and 6768 transitions. Second operand 6 states. [2019-09-09 19:51:55,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:51:55,143 INFO L93 Difference]: Finished difference Result 7390 states and 11034 transitions. [2019-09-09 19:51:55,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:51:55,146 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2019-09-09 19:51:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:51:55,185 INFO L225 Difference]: With dead ends: 7390 [2019-09-09 19:51:55,185 INFO L226 Difference]: Without dead ends: 7390 [2019-09-09 19:51:55,186 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 19:51:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2019-09-09 19:51:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 7362. [2019-09-09 19:51:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7362 states. [2019-09-09 19:51:55,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7362 states to 7362 states and 10905 transitions. [2019-09-09 19:51:55,380 INFO L78 Accepts]: Start accepts. Automaton has 7362 states and 10905 transitions. Word has length 118 [2019-09-09 19:51:55,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:51:55,381 INFO L475 AbstractCegarLoop]: Abstraction has 7362 states and 10905 transitions. [2019-09-09 19:51:55,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:51:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 7362 states and 10905 transitions. [2019-09-09 19:51:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-09 19:51:55,382 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:51:55,382 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:51:55,383 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:51:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:51:55,383 INFO L82 PathProgramCache]: Analyzing trace with hash -988905703, now seen corresponding path program 1 times [2019-09-09 19:51:55,383 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:51:55,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:55,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:51:55,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:55,387 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:51:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:51:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:51:55,507 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:51:55,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:51:55,507 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:51:55,508 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:51:55,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:51:55,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:51:55,508 INFO L87 Difference]: Start difference. First operand 7362 states and 10905 transitions. Second operand 6 states. [2019-09-09 19:51:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:51:58,219 INFO L93 Difference]: Finished difference Result 8777 states and 11868 transitions. [2019-09-09 19:51:58,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:51:58,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-09-09 19:51:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:51:58,263 INFO L225 Difference]: With dead ends: 8777 [2019-09-09 19:51:58,264 INFO L226 Difference]: Without dead ends: 8777 [2019-09-09 19:51:58,264 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 19:51:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8777 states. [2019-09-09 19:51:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8777 to 7746. [2019-09-09 19:51:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7746 states. [2019-09-09 19:51:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7746 states to 7746 states and 10527 transitions. [2019-09-09 19:51:58,470 INFO L78 Accepts]: Start accepts. Automaton has 7746 states and 10527 transitions. Word has length 123 [2019-09-09 19:51:58,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:51:58,471 INFO L475 AbstractCegarLoop]: Abstraction has 7746 states and 10527 transitions. [2019-09-09 19:51:58,471 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:51:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 7746 states and 10527 transitions. [2019-09-09 19:51:58,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-09 19:51:58,472 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:51:58,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:51:58,473 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:51:58,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:51:58,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1206556661, now seen corresponding path program 1 times [2019-09-09 19:51:58,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:51:58,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:58,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:51:58,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:58,475 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:51:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:51:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 19:51:58,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:51:58,556 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:51:58,558 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 126 with the following transitions: [2019-09-09 19:51:58,560 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [359], [361], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 19:51:58,620 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:51:58,620 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:52:03,692 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:52:05,995 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:52:05,999 INFO L272 AbstractInterpreter]: Visited 98 different actions 191 times. Merged at 4 different actions 5 times. Never widened. Performed 444 root evaluator evaluations with a maximum evaluation depth of 14. Performed 444 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:52:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:52:06,004 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:52:07,851 INFO L227 lantSequenceWeakener]: Weakened 122 states. On average, predicates are now at 77.81% of their original sizes. [2019-09-09 19:52:07,851 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:52:07,924 INFO L420 sIntCurrentIteration]: We unified 124 AI predicates to 124 [2019-09-09 19:52:07,924 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:52:07,925 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:52:07,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [4] total 13 [2019-09-09 19:52:07,926 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:52:07,927 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 19:52:07,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 19:52:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 19:52:07,927 INFO L87 Difference]: Start difference. First operand 7746 states and 10527 transitions. Second operand 11 states.