/usr/bin/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:54:33,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:54:33,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:54:33,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:54:33,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:54:33,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:54:33,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:54:33,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:54:33,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:54:33,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:54:33,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:54:33,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:54:33,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:54:33,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:54:33,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:54:33,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:54:33,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:54:33,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:54:33,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:54:33,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:54:33,116 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:54:33,147 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:54:33,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:54:33,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:54:33,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:54:33,151 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:54:33,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:54:33,152 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:54:33,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:54:33,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:54:33,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:54:33,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:54:33,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:54:33,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:54:33,156 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:54:33,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:54:33,156 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:54:33,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:54:33,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:54:33,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:54:33,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:54:33,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:54:33,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:54:33,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:54:33,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:54:33,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:54:33,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:54:33,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:54:33,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:54:33,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:54:33,424 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:54:33,441 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:54:33,444 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:54:33,445 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:54:33,446 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:54:33,446 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label19.c [2019-11-06 22:54:33,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77b3586fa/74c8261c71ba4a889d066fb83df6cfb1/FLAGdc194c08e [2019-11-06 22:54:34,178 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:54:34,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label19.c [2019-11-06 22:54:34,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77b3586fa/74c8261c71ba4a889d066fb83df6cfb1/FLAGdc194c08e [2019-11-06 22:54:34,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77b3586fa/74c8261c71ba4a889d066fb83df6cfb1 [2019-11-06 22:54:34,401 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:54:34,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:54:34,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:34,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:54:34,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:54:34,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:34" (1/1) ... [2019-11-06 22:54:34,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39ffad2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:34, skipping insertion in model container [2019-11-06 22:54:34,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:34" (1/1) ... [2019-11-06 22:54:34,419 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:54:34,504 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:54:35,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:35,317 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:54:35,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:35,555 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:54:35,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:35 WrapperNode [2019-11-06 22:54:35,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:35,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:54:35,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:54:35,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:54:35,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:35" (1/1) ... [2019-11-06 22:54:35,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:35" (1/1) ... [2019-11-06 22:54:35,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:35" (1/1) ... [2019-11-06 22:54:35,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:35" (1/1) ... [2019-11-06 22:54:35,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:35" (1/1) ... [2019-11-06 22:54:35,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:35" (1/1) ... [2019-11-06 22:54:35,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:35" (1/1) ... [2019-11-06 22:54:35,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:54:35,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:54:35,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:54:35,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:54:35,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:35" (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 [2019-11-06 22:54:35,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:54:35,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:54:35,802 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:54:35,802 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:54:35,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:54:35,802 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:54:35,803 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:54:35,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:54:35,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:54:35,803 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:54:35,803 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:54:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:54:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:54:38,085 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:54:38,086 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:54:38,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:38 BoogieIcfgContainer [2019-11-06 22:54:38,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:54:38,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:54:38,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:54:38,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:54:38,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:34" (1/3) ... [2019-11-06 22:54:38,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9fb69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:38, skipping insertion in model container [2019-11-06 22:54:38,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:35" (2/3) ... [2019-11-06 22:54:38,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9fb69e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:38, skipping insertion in model container [2019-11-06 22:54:38,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:38" (3/3) ... [2019-11-06 22:54:38,105 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label19.c [2019-11-06 22:54:38,115 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:54:38,127 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:54:38,138 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:54:38,179 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:54:38,179 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:54:38,179 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:54:38,179 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:54:38,180 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:54:38,180 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:54:38,180 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:54:38,180 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:54:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:54:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 22:54:38,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:38,226 INFO L410 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] [2019-11-06 22:54:38,228 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:38,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1232696998, now seen corresponding path program 1 times [2019-11-06 22:54:38,244 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:38,245 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008361460] [2019-11-06 22:54:38,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:38,609 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008361460] [2019-11-06 22:54:38,610 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:38,610 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:54:38,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692723899] [2019-11-06 22:54:38,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:54:38,618 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:38,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:54:38,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:54:38,635 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-11-06 22:54:42,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:42,306 INFO L93 Difference]: Finished difference Result 1509 states and 2834 transitions. [2019-11-06 22:54:42,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:54:42,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2019-11-06 22:54:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:42,347 INFO L225 Difference]: With dead ends: 1509 [2019-11-06 22:54:42,348 INFO L226 Difference]: Without dead ends: 1019 [2019-11-06 22:54:42,362 INFO L630 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 [2019-11-06 22:54:42,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-11-06 22:54:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 682. [2019-11-06 22:54:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:54:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-11-06 22:54:42,474 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 49 [2019-11-06 22:54:42,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:42,475 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-11-06 22:54:42,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:54:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-11-06 22:54:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-06 22:54:42,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:42,481 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:42,482 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:42,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:42,482 INFO L82 PathProgramCache]: Analyzing trace with hash -768303897, now seen corresponding path program 1 times [2019-11-06 22:54:42,483 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:42,483 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116471100] [2019-11-06 22:54:42,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:42,714 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116471100] [2019-11-06 22:54:42,715 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:42,715 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:54:42,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034905098] [2019-11-06 22:54:42,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:54:42,719 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:42,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:54:42,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:54:42,722 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 5 states. [2019-11-06 22:54:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:45,938 INFO L93 Difference]: Finished difference Result 2068 states and 3645 transitions. [2019-11-06 22:54:45,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:45,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2019-11-06 22:54:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:45,955 INFO L225 Difference]: With dead ends: 2068 [2019-11-06 22:54:45,955 INFO L226 Difference]: Without dead ends: 1392 [2019-11-06 22:54:45,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:54:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2019-11-06 22:54:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1374. [2019-11-06 22:54:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1374 states. [2019-11-06 22:54:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2277 transitions. [2019-11-06 22:54:46,020 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2277 transitions. Word has length 118 [2019-11-06 22:54:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:46,022 INFO L462 AbstractCegarLoop]: Abstraction has 1374 states and 2277 transitions. [2019-11-06 22:54:46,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:54:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2277 transitions. [2019-11-06 22:54:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 22:54:46,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:46,034 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:46,034 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:46,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:46,035 INFO L82 PathProgramCache]: Analyzing trace with hash -825960706, now seen corresponding path program 1 times [2019-11-06 22:54:46,035 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:46,035 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126296857] [2019-11-06 22:54:46,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:46,215 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126296857] [2019-11-06 22:54:46,216 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:46,216 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:46,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452566532] [2019-11-06 22:54:46,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:46,217 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:46,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:46,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:46,218 INFO L87 Difference]: Start difference. First operand 1374 states and 2277 transitions. Second operand 6 states. [2019-11-06 22:54:48,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:48,688 INFO L93 Difference]: Finished difference Result 3463 states and 5746 transitions. [2019-11-06 22:54:48,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:48,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2019-11-06 22:54:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:48,704 INFO L225 Difference]: With dead ends: 3463 [2019-11-06 22:54:48,704 INFO L226 Difference]: Without dead ends: 2095 [2019-11-06 22:54:48,707 INFO L630 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 [2019-11-06 22:54:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2019-11-06 22:54:48,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 2077. [2019-11-06 22:54:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2019-11-06 22:54:48,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3299 transitions. [2019-11-06 22:54:48,771 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3299 transitions. Word has length 121 [2019-11-06 22:54:48,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:48,772 INFO L462 AbstractCegarLoop]: Abstraction has 2077 states and 3299 transitions. [2019-11-06 22:54:48,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3299 transitions. [2019-11-06 22:54:48,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:54:48,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:48,774 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:48,775 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:48,775 INFO L82 PathProgramCache]: Analyzing trace with hash -66026577, now seen corresponding path program 1 times [2019-11-06 22:54:48,775 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:48,775 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684071148] [2019-11-06 22:54:48,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:48,882 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684071148] [2019-11-06 22:54:48,882 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:48,883 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:48,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324594065] [2019-11-06 22:54:48,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:48,884 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:48,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:48,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:48,884 INFO L87 Difference]: Start difference. First operand 2077 states and 3299 transitions. Second operand 6 states. [2019-11-06 22:54:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:51,064 INFO L93 Difference]: Finished difference Result 4874 states and 7768 transitions. [2019-11-06 22:54:51,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:51,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-11-06 22:54:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:51,092 INFO L225 Difference]: With dead ends: 4874 [2019-11-06 22:54:51,092 INFO L226 Difference]: Without dead ends: 2803 [2019-11-06 22:54:51,098 INFO L630 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 [2019-11-06 22:54:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2019-11-06 22:54:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2790. [2019-11-06 22:54:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2019-11-06 22:54:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 4061 transitions. [2019-11-06 22:54:51,183 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 4061 transitions. Word has length 122 [2019-11-06 22:54:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:51,184 INFO L462 AbstractCegarLoop]: Abstraction has 2790 states and 4061 transitions. [2019-11-06 22:54:51,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 4061 transitions. [2019-11-06 22:54:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 22:54:51,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:51,187 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:51,187 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:51,188 INFO L82 PathProgramCache]: Analyzing trace with hash -388481722, now seen corresponding path program 1 times [2019-11-06 22:54:51,188 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:51,188 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710161859] [2019-11-06 22:54:51,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:51,355 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710161859] [2019-11-06 22:54:51,355 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:51,355 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:51,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609955294] [2019-11-06 22:54:51,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:51,356 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:51,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:51,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:51,357 INFO L87 Difference]: Start difference. First operand 2790 states and 4061 transitions. Second operand 6 states. [2019-11-06 22:54:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:53,972 INFO L93 Difference]: Finished difference Result 7362 states and 11039 transitions. [2019-11-06 22:54:53,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:54:53,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-11-06 22:54:53,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:54,046 INFO L225 Difference]: With dead ends: 7362 [2019-11-06 22:54:54,047 INFO L226 Difference]: Without dead ends: 4578 [2019-11-06 22:54:54,053 INFO L630 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 [2019-11-06 22:54:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4578 states. [2019-11-06 22:54:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4578 to 4526. [2019-11-06 22:54:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4526 states. [2019-11-06 22:54:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4526 states to 4526 states and 6572 transitions. [2019-11-06 22:54:54,185 INFO L78 Accepts]: Start accepts. Automaton has 4526 states and 6572 transitions. Word has length 125 [2019-11-06 22:54:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:54,186 INFO L462 AbstractCegarLoop]: Abstraction has 4526 states and 6572 transitions. [2019-11-06 22:54:54,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 4526 states and 6572 transitions. [2019-11-06 22:54:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-06 22:54:54,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:54,189 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:54,189 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:54,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:54,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1273719254, now seen corresponding path program 1 times [2019-11-06 22:54:54,190 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:54,190 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18260250] [2019-11-06 22:54:54,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:54,329 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18260250] [2019-11-06 22:54:54,329 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:54,330 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:54,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239483940] [2019-11-06 22:54:54,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:54,331 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:54,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:54,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:54,331 INFO L87 Difference]: Start difference. First operand 4526 states and 6572 transitions. Second operand 6 states. [2019-11-06 22:54:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:56,913 INFO L93 Difference]: Finished difference Result 12150 states and 17943 transitions. [2019-11-06 22:54:56,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:56,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2019-11-06 22:54:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:56,947 INFO L225 Difference]: With dead ends: 12150 [2019-11-06 22:54:56,948 INFO L226 Difference]: Without dead ends: 7630 [2019-11-06 22:54:56,960 INFO L630 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 [2019-11-06 22:54:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2019-11-06 22:54:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 6239. [2019-11-06 22:54:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6239 states. [2019-11-06 22:54:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6239 states to 6239 states and 8457 transitions. [2019-11-06 22:54:57,140 INFO L78 Accepts]: Start accepts. Automaton has 6239 states and 8457 transitions. Word has length 133 [2019-11-06 22:54:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:57,140 INFO L462 AbstractCegarLoop]: Abstraction has 6239 states and 8457 transitions. [2019-11-06 22:54:57,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 6239 states and 8457 transitions. [2019-11-06 22:54:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-06 22:54:57,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:57,142 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:57,143 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash -358644173, now seen corresponding path program 1 times [2019-11-06 22:54:57,148 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:57,148 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906968865] [2019-11-06 22:54:57,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:57,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906968865] [2019-11-06 22:54:57,253 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:57,253 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:54:57,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375462479] [2019-11-06 22:54:57,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:54:57,254 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:57,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:54:57,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:54:57,255 INFO L87 Difference]: Start difference. First operand 6239 states and 8457 transitions. Second operand 4 states. [2019-11-06 22:54:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:59,874 INFO L93 Difference]: Finished difference Result 14509 states and 19327 transitions. [2019-11-06 22:54:59,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:54:59,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-11-06 22:54:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:59,902 INFO L225 Difference]: With dead ends: 14509 [2019-11-06 22:54:59,903 INFO L226 Difference]: Without dead ends: 7216 [2019-11-06 22:54:59,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:54:59,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7216 states. [2019-11-06 22:55:00,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7216 to 6540. [2019-11-06 22:55:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6540 states. [2019-11-06 22:55:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 7231 transitions. [2019-11-06 22:55:00,095 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 7231 transitions. Word has length 140 [2019-11-06 22:55:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:00,096 INFO L462 AbstractCegarLoop]: Abstraction has 6540 states and 7231 transitions. [2019-11-06 22:55:00,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:55:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 7231 transitions. [2019-11-06 22:55:00,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2019-11-06 22:55:00,123 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:00,124 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:55:00,124 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:00,125 INFO L82 PathProgramCache]: Analyzing trace with hash 88546971, now seen corresponding path program 1 times [2019-11-06 22:55:00,125 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:00,125 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043206079] [2019-11-06 22:55:00,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 243 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:55:00,904 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043206079] [2019-11-06 22:55:00,904 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589053936] [2019-11-06 22:55:00,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:01,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:01,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 440 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-06 22:55:01,489 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 243 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:55:01,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1006738288] [2019-11-06 22:55:01,938 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 595 [2019-11-06 22:55:02,010 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:55:02,010 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)