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/Problem11_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:59:43,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:59:43,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:59:43,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:59:43,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:59:43,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:59:43,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:59:43,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:59:43,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:59:43,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:59:43,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:59:43,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:59:43,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:59:43,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:59:43,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:59:43,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:59:43,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:59:43,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:59:43,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:59:43,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:59:43,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:59:43,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:59:43,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:59:43,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:59:43,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:59:43,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:59:43,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:59:43,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:59:43,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:59:43,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:59:43,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:59:43,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:59:43,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:59:43,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:59:43,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:59:43,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:59:43,252 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 17:59:43,279 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:59:43,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:59:43,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:59:43,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:59:43,284 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:59:43,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:59:43,284 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:59:43,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:59:43,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:59:43,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:59:43,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:59:43,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:59:43,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:59:43,285 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:59:43,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:59:43,286 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:59:43,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:59:43,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:59:43,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:59:43,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:59:43,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:59:43,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:59:43,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:59:43,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:59:43,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:59:43,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:59:43,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:59:43,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:59:43,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:59:43,564 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:59:43,577 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:59:43,580 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:59:43,582 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:59:43,582 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:59:43,583 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label15.c [2019-10-13 17:59:43,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b18e0633/ec46d34f81234c12a283e420ae7d45c8/FLAG4a52b960f [2019-10-13 17:59:44,295 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:59:44,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label15.c [2019-10-13 17:59:44,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b18e0633/ec46d34f81234c12a283e420ae7d45c8/FLAG4a52b960f [2019-10-13 17:59:44,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b18e0633/ec46d34f81234c12a283e420ae7d45c8 [2019-10-13 17:59:44,515 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:59:44,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:59:44,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:59:44,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:59:44,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:59:44,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:44" (1/1) ... [2019-10-13 17:59:44,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc80f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:44, skipping insertion in model container [2019-10-13 17:59:44,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:44" (1/1) ... [2019-10-13 17:59:44,536 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:59:44,612 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:59:45,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:59:45,443 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:59:45,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:59:45,663 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:59:45,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:45 WrapperNode [2019-10-13 17:59:45,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:59:45,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:59:45,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:59:45,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:59:45,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:45" (1/1) ... [2019-10-13 17:59:45,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:45" (1/1) ... [2019-10-13 17:59:45,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:45" (1/1) ... [2019-10-13 17:59:45,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:45" (1/1) ... [2019-10-13 17:59:45,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:45" (1/1) ... [2019-10-13 17:59:45,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:45" (1/1) ... [2019-10-13 17:59:45,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:45" (1/1) ... [2019-10-13 17:59:45,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:59:45,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:59:45,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:59:45,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:59:45,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:45" (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 17:59:45,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:59:45,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:59:45,942 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:59:45,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:59:45,943 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:59:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:59:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:59:45,944 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:59:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:59:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:59:45,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:59:47,888 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:59:47,889 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:59:47,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:47 BoogieIcfgContainer [2019-10-13 17:59:47,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:59:47,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:59:47,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:59:47,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:59:47,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:59:44" (1/3) ... [2019-10-13 17:59:47,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@babcfe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:47, skipping insertion in model container [2019-10-13 17:59:47,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:45" (2/3) ... [2019-10-13 17:59:47,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@babcfe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:47, skipping insertion in model container [2019-10-13 17:59:47,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:47" (3/3) ... [2019-10-13 17:59:47,910 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label15.c [2019-10-13 17:59:47,923 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:59:47,936 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:59:47,949 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:59:47,992 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:59:47,993 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:59:47,994 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:59:47,995 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:59:47,995 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:59:47,995 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:59:47,995 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:59:47,996 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:59:48,033 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 17:59:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:59:48,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:48,041 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] [2019-10-13 17:59:48,045 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:48,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1453317925, now seen corresponding path program 1 times [2019-10-13 17:59:48,062 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:48,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537682961] [2019-10-13 17:59:48,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:48,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:48,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:48,480 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 17:59:48,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537682961] [2019-10-13 17:59:48,482 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:48,483 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:59:48,483 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080668329] [2019-10-13 17:59:48,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:59:48,488 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:48,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:59:48,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:59:48,506 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 17:59:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:51,917 INFO L93 Difference]: Finished difference Result 993 states and 1777 transitions. [2019-10-13 17:59:51,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:59:51,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-13 17:59:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:51,943 INFO L225 Difference]: With dead ends: 993 [2019-10-13 17:59:51,944 INFO L226 Difference]: Without dead ends: 632 [2019-10-13 17:59:51,956 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 17:59:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2019-10-13 17:59:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 628. [2019-10-13 17:59:52,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-10-13 17:59:52,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 886 transitions. [2019-10-13 17:59:52,065 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 886 transitions. Word has length 20 [2019-10-13 17:59:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:52,066 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 886 transitions. [2019-10-13 17:59:52,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:59:52,066 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 886 transitions. [2019-10-13 17:59:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-13 17:59:52,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:52,072 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:59:52,072 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1546422986, now seen corresponding path program 1 times [2019-10-13 17:59:52,073 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:52,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061345265] [2019-10-13 17:59:52,074 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:52,074 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:52,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:52,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061345265] [2019-10-13 17:59:52,511 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:52,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:59:52,512 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381500208] [2019-10-13 17:59:52,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:59:52,514 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:52,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:59:52,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:59:52,515 INFO L87 Difference]: Start difference. First operand 628 states and 886 transitions. Second operand 8 states. [2019-10-13 17:59:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:55,172 INFO L93 Difference]: Finished difference Result 1873 states and 2696 transitions. [2019-10-13 17:59:55,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:59:55,173 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2019-10-13 17:59:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:55,184 INFO L225 Difference]: With dead ends: 1873 [2019-10-13 17:59:55,185 INFO L226 Difference]: Without dead ends: 1251 [2019-10-13 17:59:55,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:59:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-10-13 17:59:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1226. [2019-10-13 17:59:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2019-10-13 17:59:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1619 transitions. [2019-10-13 17:59:55,281 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1619 transitions. Word has length 100 [2019-10-13 17:59:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:55,282 INFO L462 AbstractCegarLoop]: Abstraction has 1226 states and 1619 transitions. [2019-10-13 17:59:55,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:59:55,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1619 transitions. [2019-10-13 17:59:55,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-13 17:59:55,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:55,325 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:59:55,326 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:55,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:55,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1386273764, now seen corresponding path program 1 times [2019-10-13 17:59:55,327 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:55,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654281565] [2019-10-13 17:59:55,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:55,329 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:55,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:55,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654281565] [2019-10-13 17:59:55,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605657388] [2019-10-13 17:59:55,667 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 17:59:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:55,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:55,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:55,925 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:55,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:59:55,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044625293] [2019-10-13 17:59:55,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:59:55,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:55,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:59:55,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:55,928 INFO L87 Difference]: Start difference. First operand 1226 states and 1619 transitions. Second operand 3 states. [2019-10-13 17:59:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:57,090 INFO L93 Difference]: Finished difference Result 3612 states and 4883 transitions. [2019-10-13 17:59:57,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:59:57,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2019-10-13 17:59:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:57,105 INFO L225 Difference]: With dead ends: 3612 [2019-10-13 17:59:57,106 INFO L226 Difference]: Without dead ends: 2392 [2019-10-13 17:59:57,110 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2019-10-13 17:59:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2189. [2019-10-13 17:59:57,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2189 states. [2019-10-13 17:59:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 2912 transitions. [2019-10-13 17:59:57,184 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 2912 transitions. Word has length 151 [2019-10-13 17:59:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:57,185 INFO L462 AbstractCegarLoop]: Abstraction has 2189 states and 2912 transitions. [2019-10-13 17:59:57,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:59:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 2912 transitions. [2019-10-13 17:59:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-13 17:59:57,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:57,191 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:57,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:57,403 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:57,403 INFO L82 PathProgramCache]: Analyzing trace with hash 782773517, now seen corresponding path program 1 times [2019-10-13 17:59:57,404 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:57,404 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167933721] [2019-10-13 17:59:57,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:57,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:57,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 26 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:59:57,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167933721] [2019-10-13 17:59:57,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207833649] [2019-10-13 17:59:57,711 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 17:59:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:57,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:59:57,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:59:57,915 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:57,915 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 17:59:57,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981698130] [2019-10-13 17:59:57,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:59:57,917 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:57,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:59:57,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:59:57,918 INFO L87 Difference]: Start difference. First operand 2189 states and 2912 transitions. Second operand 5 states. [2019-10-13 17:59:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:59,597 INFO L93 Difference]: Finished difference Result 5406 states and 7546 transitions. [2019-10-13 17:59:59,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:59:59,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2019-10-13 17:59:59,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:59,629 INFO L225 Difference]: With dead ends: 5406 [2019-10-13 17:59:59,629 INFO L226 Difference]: Without dead ends: 3223 [2019-10-13 17:59:59,636 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:59:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2019-10-13 17:59:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3183. [2019-10-13 17:59:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2019-10-13 17:59:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4270 transitions. [2019-10-13 17:59:59,770 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4270 transitions. Word has length 186 [2019-10-13 17:59:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:59,772 INFO L462 AbstractCegarLoop]: Abstraction has 3183 states and 4270 transitions. [2019-10-13 17:59:59,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:59:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4270 transitions. [2019-10-13 17:59:59,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-13 17:59:59,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:59,777 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 17:59:59,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:59,990 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:59,990 INFO L82 PathProgramCache]: Analyzing trace with hash -2027682720, now seen corresponding path program 1 times [2019-10-13 17:59:59,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:59,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315930507] [2019-10-13 17:59:59,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:59,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:59,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 18:00:00,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315930507] [2019-10-13 18:00:00,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827874376] [2019-10-13 18:00:00,416 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 18:00:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:00,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:00:00,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:00,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 18:00:00,637 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:00,637 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2019-10-13 18:00:00,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101459239] [2019-10-13 18:00:00,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:00,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:00,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:00,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:00:00,639 INFO L87 Difference]: Start difference. First operand 3183 states and 4270 transitions. Second operand 5 states. [2019-10-13 18:00:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:02,533 INFO L93 Difference]: Finished difference Result 6423 states and 8722 transitions. [2019-10-13 18:00:02,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:02,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2019-10-13 18:00:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:02,554 INFO L225 Difference]: With dead ends: 6423 [2019-10-13 18:00:02,554 INFO L226 Difference]: Without dead ends: 3434 [2019-10-13 18:00:02,563 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:00:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2019-10-13 18:00:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3407. [2019-10-13 18:00:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3407 states. [2019-10-13 18:00:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 4566 transitions. [2019-10-13 18:00:02,656 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 4566 transitions. Word has length 187 [2019-10-13 18:00:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:02,656 INFO L462 AbstractCegarLoop]: Abstraction has 3407 states and 4566 transitions. [2019-10-13 18:00:02,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 4566 transitions. [2019-10-13 18:00:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-13 18:00:02,660 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:02,661 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:02,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:02,865 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:02,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:02,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1231270553, now seen corresponding path program 1 times [2019-10-13 18:00:02,866 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:02,866 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786585309] [2019-10-13 18:00:02,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:02,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:02,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 106 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:03,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786585309] [2019-10-13 18:00:03,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060856998] [2019-10-13 18:00:03,270 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 [2019-10-13 18:00:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:03,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-13 18:00:03,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:03,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:03,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:03,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:03,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:03,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:03,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:03,520 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:03,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:22,047 WARN L191 SmtUtils]: Spent 18.42 s on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2019-10-13 18:00:22,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:22,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:22,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:22,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:22,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms