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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:04:08,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:04:08,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:04:08,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:04:08,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:04:08,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:04:08,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:04:08,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:04:08,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:04:08,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:04:08,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:04:08,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:04:08,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:04:08,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:04:08,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:04:08,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:04:08,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:04:08,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:04:08,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:04:08,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:04:08,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:04:08,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:04:08,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:04:08,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:04:08,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:04:08,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:04:08,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:04:08,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:04:08,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:04:08,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:04:08,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:04:08,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:04:08,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:04:08,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:04:08,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:04:08,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:04:08,878 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 [2019-10-14 22:04:08,901 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:04:08,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:04:08,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:04:08,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:04:08,904 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:04:08,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:04:08,904 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:04:08,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:04:08,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:04:08,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:04:08,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:04:08,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:04:08,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:04:08,907 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:04:08,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:04:08,907 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:04:08,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:04:08,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:04:08,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:04:08,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:04:08,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:04:08,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:08,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:04:08,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:04:08,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:04:08,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:04:08,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:04:08,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:04:08,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:04:09,165 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:04:09,182 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:04:09,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:04:09,187 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:04:09,188 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:04:09,189 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label21.c [2019-10-14 22:04:09,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b03e8fd3/699997f6e8934fc39071c981fc0bea86/FLAG93f4a0af1 [2019-10-14 22:04:09,969 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:04:09,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label21.c [2019-10-14 22:04:09,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b03e8fd3/699997f6e8934fc39071c981fc0bea86/FLAG93f4a0af1 [2019-10-14 22:04:10,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b03e8fd3/699997f6e8934fc39071c981fc0bea86 [2019-10-14 22:04:10,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:04:10,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:04:10,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:10,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:04:10,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:04:10,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:10" (1/1) ... [2019-10-14 22:04:10,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fe3b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:10, skipping insertion in model container [2019-10-14 22:04:10,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:10" (1/1) ... [2019-10-14 22:04:10,165 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:04:10,244 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:04:10,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:11,007 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:04:11,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:11,351 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:04:11,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:11 WrapperNode [2019-10-14 22:04:11,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:11,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:04:11,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:04:11,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:04:11,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:11" (1/1) ... [2019-10-14 22:04:11,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:11" (1/1) ... [2019-10-14 22:04:11,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:11" (1/1) ... [2019-10-14 22:04:11,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:11" (1/1) ... [2019-10-14 22:04:11,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:11" (1/1) ... [2019-10-14 22:04:11,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:11" (1/1) ... [2019-10-14 22:04:11,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:11" (1/1) ... [2019-10-14 22:04:11,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:04:11,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:04:11,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:04:11,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:04:11,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:11" (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 [2019-10-14 22:04:11,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:04:11,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:04:11,639 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:04:11,639 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:04:11,639 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:04:11,640 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:04:11,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:04:11,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:04:11,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:04:11,641 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:04:11,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:04:11,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:04:11,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:04:14,068 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:04:14,068 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:04:14,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:14 BoogieIcfgContainer [2019-10-14 22:04:14,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:04:14,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:04:14,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:04:14,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:04:14,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:04:10" (1/3) ... [2019-10-14 22:04:14,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310511cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:14, skipping insertion in model container [2019-10-14 22:04:14,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:11" (2/3) ... [2019-10-14 22:04:14,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310511cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:14, skipping insertion in model container [2019-10-14 22:04:14,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:14" (3/3) ... [2019-10-14 22:04:14,094 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label21.c [2019-10-14 22:04:14,110 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:04:14,122 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:04:14,134 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:04:14,179 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:04:14,179 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:04:14,179 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:04:14,179 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:04:14,179 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:04:14,180 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:04:14,180 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:04:14,180 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:04:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:04:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 22:04:14,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:14,230 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:14,233 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:14,239 INFO L82 PathProgramCache]: Analyzing trace with hash -782110827, now seen corresponding path program 1 times [2019-10-14 22:04:14,248 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:14,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650076216] [2019-10-14 22:04:14,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:14,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:14,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:14,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650076216] [2019-10-14 22:04:14,579 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:14,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:04:14,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776351598] [2019-10-14 22:04:14,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:14,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:14,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:14,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:04:14,603 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:04:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:19,779 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-14 22:04:19,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:04:19,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2019-10-14 22:04:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:19,806 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:04:19,806 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:04:19,817 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:19,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:04:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:04:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:04:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-10-14 22:04:19,954 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 44 [2019-10-14 22:04:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:19,955 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-10-14 22:04:19,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-10-14 22:04:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-10-14 22:04:19,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:19,970 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:19,970 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:19,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1818262613, now seen corresponding path program 1 times [2019-10-14 22:04:19,971 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:19,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023084941] [2019-10-14 22:04:19,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:19,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:19,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 74 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:20,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023084941] [2019-10-14 22:04:20,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880624269] [2019-10-14 22:04:20,526 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 [2019-10-14 22:04:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:20,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:20,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 22:04:20,837 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:20,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-14 22:04:20,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698407074] [2019-10-14 22:04:20,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:20,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:20,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:20,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:20,842 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-10-14 22:04:23,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:23,891 INFO L93 Difference]: Finished difference Result 3129 states and 5063 transitions. [2019-10-14 22:04:23,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:04:23,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 226 [2019-10-14 22:04:23,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:23,913 INFO L225 Difference]: With dead ends: 3129 [2019-10-14 22:04:23,914 INFO L226 Difference]: Without dead ends: 2104 [2019-10-14 22:04:23,926 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2019-10-14 22:04:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2083. [2019-10-14 22:04:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-10-14 22:04:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3187 transitions. [2019-10-14 22:04:24,028 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3187 transitions. Word has length 226 [2019-10-14 22:04:24,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:24,031 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3187 transitions. [2019-10-14 22:04:24,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3187 transitions. [2019-10-14 22:04:24,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-10-14 22:04:24,043 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:24,044 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:24,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:24,253 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:24,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1261652084, now seen corresponding path program 1 times [2019-10-14 22:04:24,255 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:24,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433203213] [2019-10-14 22:04:24,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:24,256 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:24,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 74 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:24,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433203213] [2019-10-14 22:04:24,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839660247] [2019-10-14 22:04:24,618 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 [2019-10-14 22:04:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:24,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:24,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 22:04:24,799 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:24,800 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:24,800 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920961058] [2019-10-14 22:04:24,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:24,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:24,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:24,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:24,802 INFO L87 Difference]: Start difference. First operand 2083 states and 3187 transitions. Second operand 5 states. [2019-10-14 22:04:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:27,566 INFO L93 Difference]: Finished difference Result 6311 states and 9954 transitions. [2019-10-14 22:04:27,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:04:27,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2019-10-14 22:04:27,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:27,595 INFO L225 Difference]: With dead ends: 6311 [2019-10-14 22:04:27,596 INFO L226 Difference]: Without dead ends: 4234 [2019-10-14 22:04:27,603 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:04:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-10-14 22:04:27,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-10-14 22:04:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-10-14 22:04:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5792 transitions. [2019-10-14 22:04:27,748 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5792 transitions. Word has length 261 [2019-10-14 22:04:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:27,750 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5792 transitions. [2019-10-14 22:04:27,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5792 transitions. [2019-10-14 22:04:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-10-14 22:04:27,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:27,756 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:27,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:27,961 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:27,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:27,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1804095668, now seen corresponding path program 1 times [2019-10-14 22:04:27,961 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:27,962 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510025537] [2019-10-14 22:04:27,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:27,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:27,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 22:04:28,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510025537] [2019-10-14 22:04:28,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341842697] [2019-10-14 22:04:28,540 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 [2019-10-14 22:04:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:28,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:28,779 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:28,779 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 22:04:28,780 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323025589] [2019-10-14 22:04:28,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:04:28,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:28,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:04:28,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:28,783 INFO L87 Difference]: Start difference. First operand 4198 states and 5792 transitions. Second operand 12 states. [2019-10-14 22:04:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:36,164 INFO L93 Difference]: Finished difference Result 13272 states and 19295 transitions. [2019-10-14 22:04:36,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 22:04:36,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 273 [2019-10-14 22:04:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:36,202 INFO L225 Difference]: With dead ends: 13272 [2019-10-14 22:04:36,202 INFO L226 Difference]: Without dead ends: 7642 [2019-10-14 22:04:36,219 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 281 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:04:36,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-10-14 22:04:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 6238. [2019-10-14 22:04:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6238 states. [2019-10-14 22:04:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6238 states to 6238 states and 7140 transitions. [2019-10-14 22:04:36,394 INFO L78 Accepts]: Start accepts. Automaton has 6238 states and 7140 transitions. Word has length 273 [2019-10-14 22:04:36,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:36,396 INFO L462 AbstractCegarLoop]: Abstraction has 6238 states and 7140 transitions. [2019-10-14 22:04:36,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:04:36,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6238 states and 7140 transitions. [2019-10-14 22:04:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2019-10-14 22:04:36,410 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:36,410 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:36,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:36,616 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:36,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:36,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2134090324, now seen corresponding path program 1 times [2019-10-14 22:04:36,617 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:36,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065109724] [2019-10-14 22:04:36,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:36,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:36,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 148 proven. 293 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2019-10-14 22:04:37,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065109724] [2019-10-14 22:04:37,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897853808] [2019-10-14 22:04:37,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:37,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:37,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2019-10-14 22:04:37,766 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:37,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:37,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419631854] [2019-10-14 22:04:37,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:37,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:37,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:37,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:37,768 INFO L87 Difference]: Start difference. First operand 6238 states and 7140 transitions. Second operand 5 states. [2019-10-14 22:04:39,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:39,612 INFO L93 Difference]: Finished difference Result 13848 states and 15883 transitions. [2019-10-14 22:04:39,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:04:39,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2019-10-14 22:04:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:39,647 INFO L225 Difference]: With dead ends: 13848 [2019-10-14 22:04:39,647 INFO L226 Difference]: Without dead ends: 7616 [2019-10-14 22:04:39,663 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 491 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:39,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2019-10-14 22:04:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7600. [2019-10-14 22:04:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7600 states. [2019-10-14 22:04:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7600 states to 7600 states and 8425 transitions. [2019-10-14 22:04:39,827 INFO L78 Accepts]: Start accepts. Automaton has 7600 states and 8425 transitions. Word has length 487 [2019-10-14 22:04:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:39,835 INFO L462 AbstractCegarLoop]: Abstraction has 7600 states and 8425 transitions. [2019-10-14 22:04:39,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 7600 states and 8425 transitions. [2019-10-14 22:04:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2019-10-14 22:04:39,854 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:39,855 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2019-10-14 22:04:40,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:40,059 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:40,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1663829424, now seen corresponding path program 1 times [2019-10-14 22:04:40,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:40,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495322483] [2019-10-14 22:04:40,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:40,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:40,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 268 proven. 189 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-14 22:04:41,070 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495322483] [2019-10-14 22:04:41,070 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415397183] [2019-10-14 22:04:41,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:41,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:41,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 571 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2019-10-14 22:04:41,477 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:41,478 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:04:41,478 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453186692] [2019-10-14 22:04:41,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:41,479 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:41,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:41,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:41,480 INFO L87 Difference]: Start difference. First operand 7600 states and 8425 transitions. Second operand 11 states.