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/Problem15_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:04,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:04,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:04,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:07:04,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:07:04,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:07:04,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:07:04,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:07:04,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:07:04,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:07:04,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:07:04,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:07:04,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:04,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:04,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:04,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:04,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:04,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:04,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:04,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:04,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:04,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:04,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:04,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:04,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:04,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:04,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:04,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:04,869 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 [2019-10-15 00:07:04,890 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:04,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:04,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:04,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:04,892 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:04,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:04,895 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:04,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:04,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:04,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:04,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:04,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:04,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:04,896 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:04,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:04,897 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:04,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:04,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:04,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:04,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:04,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:04,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:04,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:04,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:04,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:04,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:04,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:04,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:04,901 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 [2019-10-15 00:07:05,178 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:05,197 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:05,200 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:05,202 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:05,202 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:05,203 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-10-15 00:07:05,274 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/affd3ebb5/17f2828b8e7f4e228ae248a23591c940/FLAG610c81afa [2019-10-15 00:07:05,932 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:05,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-10-15 00:07:05,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/affd3ebb5/17f2828b8e7f4e228ae248a23591c940/FLAG610c81afa [2019-10-15 00:07:06,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/affd3ebb5/17f2828b8e7f4e228ae248a23591c940 [2019-10-15 00:07:06,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:06,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:06,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:06,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:06,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:06,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:06" (1/1) ... [2019-10-15 00:07:06,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46dc529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:06, skipping insertion in model container [2019-10-15 00:07:06,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:06" (1/1) ... [2019-10-15 00:07:06,152 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:06,241 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:07,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:07,226 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:07,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:07,566 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:07,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:07 WrapperNode [2019-10-15 00:07:07,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:07,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:07,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:07,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:07,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:07" (1/1) ... [2019-10-15 00:07:07,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:07" (1/1) ... [2019-10-15 00:07:07,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:07" (1/1) ... [2019-10-15 00:07:07,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:07" (1/1) ... [2019-10-15 00:07:07,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:07" (1/1) ... [2019-10-15 00:07:07,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:07" (1/1) ... [2019-10-15 00:07:07,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:07" (1/1) ... [2019-10-15 00:07:07,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:07,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:07,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:07,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:07,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:07,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:07,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:07,807 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:07,807 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:07:07,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:07,808 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:07,808 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:07:07,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:07,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:07,809 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:07,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:07,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:07,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:12,129 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:12,129 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:12,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:12 BoogieIcfgContainer [2019-10-15 00:07:12,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:12,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:12,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:12,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:12,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:06" (1/3) ... [2019-10-15 00:07:12,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea66eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:12, skipping insertion in model container [2019-10-15 00:07:12,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:07" (2/3) ... [2019-10-15 00:07:12,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea66eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:12, skipping insertion in model container [2019-10-15 00:07:12,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:12" (3/3) ... [2019-10-15 00:07:12,140 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label03.c [2019-10-15 00:07:12,149 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:12,158 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:12,169 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:12,199 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:12,199 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:12,199 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:12,199 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:12,199 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:12,200 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:12,200 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:12,200 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:12,231 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-15 00:07:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 00:07:12,239 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:12,240 INFO L380 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] [2019-10-15 00:07:12,242 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:12,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:12,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1047931325, now seen corresponding path program 1 times [2019-10-15 00:07:12,259 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:12,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906218006] [2019-10-15 00:07:12,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:12,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:12,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:12,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906218006] [2019-10-15 00:07:12,575 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:12,576 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:12,576 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947643002] [2019-10-15 00:07:12,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:12,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:12,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:12,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:12,602 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-15 00:07:17,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:17,136 INFO L93 Difference]: Finished difference Result 1554 states and 2845 transitions. [2019-10-15 00:07:17,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:17,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-15 00:07:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:17,175 INFO L225 Difference]: With dead ends: 1554 [2019-10-15 00:07:17,175 INFO L226 Difference]: Without dead ends: 1036 [2019-10-15 00:07:17,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-15 00:07:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-10-15 00:07:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-10-15 00:07:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-10-15 00:07:17,332 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 29 [2019-10-15 00:07:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:17,335 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-10-15 00:07:17,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:17,335 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-10-15 00:07:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-15 00:07:17,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:17,344 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:07:17,344 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:17,345 INFO L82 PathProgramCache]: Analyzing trace with hash 273136762, now seen corresponding path program 1 times [2019-10-15 00:07:17,346 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:17,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313967621] [2019-10-15 00:07:17,346 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:17,346 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:17,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:17,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313967621] [2019-10-15 00:07:17,624 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:17,624 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:17,625 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577204337] [2019-10-15 00:07:17,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:17,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:17,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:17,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:17,628 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-10-15 00:07:22,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:22,360 INFO L93 Difference]: Finished difference Result 2632 states and 4594 transitions. [2019-10-15 00:07:22,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:22,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2019-10-15 00:07:22,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:22,373 INFO L225 Difference]: With dead ends: 2632 [2019-10-15 00:07:22,374 INFO L226 Difference]: Without dead ends: 1941 [2019-10-15 00:07:22,376 INFO L600 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 [2019-10-15 00:07:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2019-10-15 00:07:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1936. [2019-10-15 00:07:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1936 states. [2019-10-15 00:07:22,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2971 transitions. [2019-10-15 00:07:22,427 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2971 transitions. Word has length 98 [2019-10-15 00:07:22,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:22,428 INFO L462 AbstractCegarLoop]: Abstraction has 1936 states and 2971 transitions. [2019-10-15 00:07:22,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:22,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2971 transitions. [2019-10-15 00:07:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-15 00:07:22,434 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:22,434 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:22,434 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash 962295950, now seen corresponding path program 1 times [2019-10-15 00:07:22,435 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:22,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882250558] [2019-10-15 00:07:22,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:22,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:22,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:22,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882250558] [2019-10-15 00:07:22,672 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:22,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:07:22,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410517911] [2019-10-15 00:07:22,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:22,674 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:22,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:22,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:07:22,678 INFO L87 Difference]: Start difference. First operand 1936 states and 2971 transitions. Second operand 5 states. [2019-10-15 00:07:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:31,001 INFO L93 Difference]: Finished difference Result 5496 states and 8518 transitions. [2019-10-15 00:07:31,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:07:31,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2019-10-15 00:07:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:31,025 INFO L225 Difference]: With dead ends: 5496 [2019-10-15 00:07:31,026 INFO L226 Difference]: Without dead ends: 3566 [2019-10-15 00:07:31,032 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:07:31,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2019-10-15 00:07:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3546. [2019-10-15 00:07:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3546 states. [2019-10-15 00:07:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5185 transitions. [2019-10-15 00:07:31,198 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5185 transitions. Word has length 179 [2019-10-15 00:07:31,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:31,200 INFO L462 AbstractCegarLoop]: Abstraction has 3546 states and 5185 transitions. [2019-10-15 00:07:31,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:07:31,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5185 transitions. [2019-10-15 00:07:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-15 00:07:31,209 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:31,211 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:31,211 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1613892748, now seen corresponding path program 1 times [2019-10-15 00:07:31,212 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:31,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634818080] [2019-10-15 00:07:31,212 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:31,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:31,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:07:31,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634818080] [2019-10-15 00:07:31,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7368908] [2019-10-15 00:07:31,413 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 [2019-10-15 00:07:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:31,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:07:31,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 00:07:31,656 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:07:31,918 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:07:31,918 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:07:31,918 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982512735] [2019-10-15 00:07:31,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:31,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:31,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:31,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:07:31,920 INFO L87 Difference]: Start difference. First operand 3546 states and 5185 transitions. Second operand 5 states. [2019-10-15 00:07:36,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:36,189 INFO L93 Difference]: Finished difference Result 10012 states and 15157 transitions. [2019-10-15 00:07:36,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:07:36,190 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 202 [2019-10-15 00:07:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:36,224 INFO L225 Difference]: With dead ends: 10012 [2019-10-15 00:07:36,224 INFO L226 Difference]: Without dead ends: 6472 [2019-10-15 00:07:36,236 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 400 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:07:36,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6472 states. [2019-10-15 00:07:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6472 to 5183. [2019-10-15 00:07:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5183 states. [2019-10-15 00:07:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 7218 transitions. [2019-10-15 00:07:36,408 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 7218 transitions. Word has length 202 [2019-10-15 00:07:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:36,409 INFO L462 AbstractCegarLoop]: Abstraction has 5183 states and 7218 transitions. [2019-10-15 00:07:36,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:07:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 7218 transitions. [2019-10-15 00:07:36,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-10-15 00:07:36,414 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:36,415 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:36,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:36,620 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:36,620 INFO L82 PathProgramCache]: Analyzing trace with hash -450063927, now seen corresponding path program 1 times [2019-10-15 00:07:36,621 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:36,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989552658] [2019-10-15 00:07:36,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:36,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:36,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:07:37,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989552658] [2019-10-15 00:07:37,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397386412] [2019-10-15 00:07:37,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:37,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 00:07:37,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:07:37,439 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:07:37,842 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:07:37,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2019-10-15 00:07:37,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509523355] [2019-10-15 00:07:37,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:37,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:37,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:37,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:07:37,845 INFO L87 Difference]: Start difference. First operand 5183 states and 7218 transitions. Second operand 4 states. [2019-10-15 00:07:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:41,454 INFO L93 Difference]: Finished difference Result 14419 states and 20360 transitions. [2019-10-15 00:07:41,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:41,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 303 [2019-10-15 00:07:41,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:41,497 INFO L225 Difference]: With dead ends: 14419 [2019-10-15 00:07:41,497 INFO L226 Difference]: Without dead ends: 9242 [2019-10-15 00:07:41,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:07:41,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2019-10-15 00:07:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 7392. [2019-10-15 00:07:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7392 states. [2019-10-15 00:07:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7392 states to 7392 states and 10556 transitions. [2019-10-15 00:07:41,776 INFO L78 Accepts]: Start accepts. Automaton has 7392 states and 10556 transitions. Word has length 303 [2019-10-15 00:07:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:41,777 INFO L462 AbstractCegarLoop]: Abstraction has 7392 states and 10556 transitions. [2019-10-15 00:07:41,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 7392 states and 10556 transitions. [2019-10-15 00:07:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2019-10-15 00:07:41,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:41,793 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:41,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:41,998 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:41,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:41,999 INFO L82 PathProgramCache]: Analyzing trace with hash -845667041, now seen corresponding path program 1 times [2019-10-15 00:07:42,000 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:42,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022892123] [2019-10-15 00:07:42,006 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:42,006 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:42,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:42,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022892123] [2019-10-15 00:07:42,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124881800] [2019-10-15 00:07:42,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:42,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:07:42,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:42,794 INFO L321 TraceCheckSpWp]: Computing backward predicates...