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_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:02,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:02,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:02,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:02,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:02,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:02,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:02,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:02,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:02,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:02,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:02,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:02,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:02,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:02,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:02,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:02,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:02,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:02,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:02,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:02,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:02,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:02,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:02,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:02,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:05:02,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:02,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:02,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:02,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:02,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:02,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:02,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:02,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:02,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:02,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:02,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:02,649 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 [2019-10-13 18:05:02,662 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:02,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:02,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:02,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:02,663 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:02,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:02,664 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:02,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:02,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:02,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:02,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:02,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:02,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:02,665 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:02,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:02,666 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:02,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:02,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:02,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:02,666 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:02,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:02,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:02,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:02,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:02,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:02,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:02,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:02,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:02,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:02,948 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:02,963 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:02,967 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:02,969 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:02,969 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:02,970 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label19.c [2019-10-13 18:05:03,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f762e600c/89e974c313d24c2eb481c7a96b0eec64/FLAG77f81831d [2019-10-13 18:05:03,702 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:03,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label19.c [2019-10-13 18:05:03,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f762e600c/89e974c313d24c2eb481c7a96b0eec64/FLAG77f81831d [2019-10-13 18:05:03,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f762e600c/89e974c313d24c2eb481c7a96b0eec64 [2019-10-13 18:05:03,897 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:03,899 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:03,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:03,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:03,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:03,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:03" (1/1) ... [2019-10-13 18:05:03,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f51de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:03, skipping insertion in model container [2019-10-13 18:05:03,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:03" (1/1) ... [2019-10-13 18:05:03,916 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:03,999 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:04,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:04,964 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:05,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:05,247 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:05,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:05 WrapperNode [2019-10-13 18:05:05,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:05,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:05,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:05,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:05,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:05" (1/1) ... [2019-10-13 18:05:05,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:05" (1/1) ... [2019-10-13 18:05:05,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:05" (1/1) ... [2019-10-13 18:05:05,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:05" (1/1) ... [2019-10-13 18:05:05,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:05" (1/1) ... [2019-10-13 18:05:05,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:05" (1/1) ... [2019-10-13 18:05:05,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:05" (1/1) ... [2019-10-13 18:05:05,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:05,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:05,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:05,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:05,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:05,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:05,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:05,495 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:05,495 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:05,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:07,745 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:07,746 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:07,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:07 BoogieIcfgContainer [2019-10-13 18:05:07,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:07,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:07,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:07,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:07,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:03" (1/3) ... [2019-10-13 18:05:07,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22681042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:07, skipping insertion in model container [2019-10-13 18:05:07,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:05" (2/3) ... [2019-10-13 18:05:07,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22681042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:07, skipping insertion in model container [2019-10-13 18:05:07,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:07" (3/3) ... [2019-10-13 18:05:07,759 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label19.c [2019-10-13 18:05:07,773 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:07,781 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:07,793 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:07,832 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:07,832 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:07,832 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:07,832 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:07,833 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:07,833 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:07,833 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:07,833 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 18:05:07,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:07,881 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, 1, 1, 1, 1, 1] [2019-10-13 18:05:07,883 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:07,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1232696998, now seen corresponding path program 1 times [2019-10-13 18:05:07,897 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:07,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951515212] [2019-10-13 18:05:07,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:07,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:07,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:08,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951515212] [2019-10-13 18:05:08,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:08,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:08,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983372655] [2019-10-13 18:05:08,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:08,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:08,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:08,294 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:12,884 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-10-13 18:05:12,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:12,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2019-10-13 18:05:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:12,922 INFO L225 Difference]: With dead ends: 1530 [2019-10-13 18:05:12,922 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:12,936 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:05:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1787 transitions. [2019-10-13 18:05:13,087 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1787 transitions. Word has length 49 [2019-10-13 18:05:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:13,087 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1787 transitions. [2019-10-13 18:05:13,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1787 transitions. [2019-10-13 18:05:13,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 18:05:13,094 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:13,094 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:13,094 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:13,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:13,095 INFO L82 PathProgramCache]: Analyzing trace with hash -768303897, now seen corresponding path program 1 times [2019-10-13 18:05:13,095 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:13,095 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975247522] [2019-10-13 18:05:13,096 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:13,096 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:13,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:13,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975247522] [2019-10-13 18:05:13,440 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:13,440 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:05:13,440 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138811737] [2019-10-13 18:05:13,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:05:13,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:13,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:05:13,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:05:13,443 INFO L87 Difference]: Start difference. First operand 1031 states and 1787 transitions. Second operand 8 states. [2019-10-13 18:05:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:16,918 INFO L93 Difference]: Finished difference Result 3125 states and 5529 transitions. [2019-10-13 18:05:16,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:05:16,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 118 [2019-10-13 18:05:16,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:16,937 INFO L225 Difference]: With dead ends: 3125 [2019-10-13 18:05:16,937 INFO L226 Difference]: Without dead ends: 2100 [2019-10-13 18:05:16,942 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:05:16,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-10-13 18:05:17,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1384. [2019-10-13 18:05:17,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2019-10-13 18:05:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2288 transitions. [2019-10-13 18:05:17,031 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2288 transitions. Word has length 118 [2019-10-13 18:05:17,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:17,033 INFO L462 AbstractCegarLoop]: Abstraction has 1384 states and 2288 transitions. [2019-10-13 18:05:17,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:05:17,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2288 transitions. [2019-10-13 18:05:17,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 18:05:17,043 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:17,043 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:17,044 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:17,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash -825960706, now seen corresponding path program 1 times [2019-10-13 18:05:17,046 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:17,046 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588228536] [2019-10-13 18:05:17,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:17,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:17,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:17,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588228536] [2019-10-13 18:05:17,489 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:17,489 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:05:17,489 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754053163] [2019-10-13 18:05:17,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:05:17,493 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:17,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:05:17,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:17,498 INFO L87 Difference]: Start difference. First operand 1384 states and 2288 transitions. Second operand 9 states. [2019-10-13 18:05:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:22,521 INFO L93 Difference]: Finished difference Result 4170 states and 6860 transitions. [2019-10-13 18:05:22,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:05:22,522 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2019-10-13 18:05:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:22,537 INFO L225 Difference]: With dead ends: 4170 [2019-10-13 18:05:22,537 INFO L226 Difference]: Without dead ends: 2792 [2019-10-13 18:05:22,541 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:05:22,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2019-10-13 18:05:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2773. [2019-10-13 18:05:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2773 states. [2019-10-13 18:05:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 3896 transitions. [2019-10-13 18:05:22,632 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 3896 transitions. Word has length 121 [2019-10-13 18:05:22,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:22,634 INFO L462 AbstractCegarLoop]: Abstraction has 2773 states and 3896 transitions. [2019-10-13 18:05:22,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:05:22,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 3896 transitions. [2019-10-13 18:05:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 18:05:22,637 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:22,637 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:22,638 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:22,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:22,638 INFO L82 PathProgramCache]: Analyzing trace with hash -388481722, now seen corresponding path program 1 times [2019-10-13 18:05:22,638 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:22,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834548695] [2019-10-13 18:05:22,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:22,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:22,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:22,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834548695] [2019-10-13 18:05:22,942 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:22,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:05:22,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129181951] [2019-10-13 18:05:22,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:05:22,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:22,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:05:22,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:22,944 INFO L87 Difference]: Start difference. First operand 2773 states and 3896 transitions. Second operand 9 states. [2019-10-13 18:05:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:28,644 INFO L93 Difference]: Finished difference Result 9052 states and 13211 transitions. [2019-10-13 18:05:28,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:05:28,644 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 125 [2019-10-13 18:05:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:28,677 INFO L225 Difference]: With dead ends: 9052 [2019-10-13 18:05:28,677 INFO L226 Difference]: Without dead ends: 6285 [2019-10-13 18:05:28,685 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:05:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2019-10-13 18:05:28,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 6259. [2019-10-13 18:05:28,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6259 states. [2019-10-13 18:05:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6259 states to 6259 states and 8351 transitions. [2019-10-13 18:05:28,845 INFO L78 Accepts]: Start accepts. Automaton has 6259 states and 8351 transitions. Word has length 125 [2019-10-13 18:05:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:28,847 INFO L462 AbstractCegarLoop]: Abstraction has 6259 states and 8351 transitions. [2019-10-13 18:05:28,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:05:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 6259 states and 8351 transitions. [2019-10-13 18:05:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 18:05:28,849 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:28,849 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:28,849 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:28,850 INFO L82 PathProgramCache]: Analyzing trace with hash -358644173, now seen corresponding path program 1 times [2019-10-13 18:05:28,850 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:28,850 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229879086] [2019-10-13 18:05:28,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:28,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:28,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:28,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229879086] [2019-10-13 18:05:28,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141081569] [2019-10-13 18:05:28,995 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 [2019-10-13 18:05:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:29,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:29,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:29,225 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:29,225 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:05:29,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528055784] [2019-10-13 18:05:29,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:05:29,226 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:29,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:05:29,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:05:29,227 INFO L87 Difference]: Start difference. First operand 6259 states and 8351 transitions. Second operand 3 states. [2019-10-13 18:05:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:30,908 INFO L93 Difference]: Finished difference Result 14553 states and 19735 transitions. [2019-10-13 18:05:30,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:05:30,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-10-13 18:05:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:30,944 INFO L225 Difference]: With dead ends: 14553 [2019-10-13 18:05:30,944 INFO L226 Difference]: Without dead ends: 8300 [2019-10-13 18:05:30,961 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:05:30,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8300 states. [2019-10-13 18:05:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8300 to 8300. [2019-10-13 18:05:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8300 states. [2019-10-13 18:05:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8300 states to 8300 states and 10767 transitions. [2019-10-13 18:05:31,149 INFO L78 Accepts]: Start accepts. Automaton has 8300 states and 10767 transitions. Word has length 140 [2019-10-13 18:05:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:31,150 INFO L462 AbstractCegarLoop]: Abstraction has 8300 states and 10767 transitions. [2019-10-13 18:05:31,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:05:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 8300 states and 10767 transitions. [2019-10-13 18:05:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2019-10-13 18:05:31,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:31,168 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:05:31,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:31,381 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:31,382 INFO L82 PathProgramCache]: Analyzing trace with hash -473938833, now seen corresponding path program 1 times [2019-10-13 18:05:31,383 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:31,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684079515] [2019-10-13 18:05:31,383 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:31,383 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:31,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 207 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 18:05:32,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684079515] [2019-10-13 18:05:32,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387847895] [2019-10-13 18:05:32,149 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 [2019-10-13 18:05:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:32,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:32,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 338 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-13 18:05:32,641 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:32,641 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:05:32,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761424198] [2019-10-13 18:05:32,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:32,643 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:32,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:32,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:32,644 INFO L87 Difference]: Start difference. First operand 8300 states and 10767 transitions. Second operand 11 states. [2019-10-13 18:05:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:36,781 INFO L93 Difference]: Finished difference Result 21056 states and 27884 transitions. [2019-10-13 18:05:36,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:05:36,783 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 524 [2019-10-13 18:05:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:36,833 INFO L225 Difference]: With dead ends: 21056 [2019-10-13 18:05:36,834 INFO L226 Difference]: Without dead ends: 10997 [2019-10-13 18:05:36,856 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 533 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:05:36,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10997 states. [2019-10-13 18:05:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10997 to 8933. [2019-10-13 18:05:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8933 states. [2019-10-13 18:05:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8933 states to 8933 states and 10042 transitions. [2019-10-13 18:05:37,078 INFO L78 Accepts]: Start accepts. Automaton has 8933 states and 10042 transitions. Word has length 524 [2019-10-13 18:05:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:37,078 INFO L462 AbstractCegarLoop]: Abstraction has 8933 states and 10042 transitions. [2019-10-13 18:05:37,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:05:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 8933 states and 10042 transitions. [2019-10-13 18:05:37,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2019-10-13 18:05:37,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:37,108 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, 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, 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, 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] [2019-10-13 18:05:37,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:37,314 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:37,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2124937089, now seen corresponding path program 1 times [2019-10-13 18:05:37,316 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:37,317 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497338759] [2019-10-13 18:05:37,317 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:37,317 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:37,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 273 proven. 240 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2019-10-13 18:05:38,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497338759] [2019-10-13 18:05:38,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135018151] [2019-10-13 18:05:38,440 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 [2019-10-13 18:05:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:38,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:38,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 685 proven. 2 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-13 18:05:38,984 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:38,984 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 18:05:38,984 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243871807] [2019-10-13 18:05:38,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:05:38,987 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:38,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:05:38,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:38,987 INFO L87 Difference]: Start difference. First operand 8933 states and 10042 transitions. Second operand 12 states.