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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:00:04,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:00:04,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:00:04,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:00:04,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:00:04,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:00:04,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:00:04,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:00:04,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:00:04,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:00:04,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:00:04,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:00:04,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:00:04,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:00:04,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:00:04,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:00:04,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:00:04,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:00:04,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:00:04,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:00:04,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:00:04,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:00:04,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:00:04,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:00:04,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:00:04,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:00:04,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:00:04,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:00:04,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:00:04,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:00:04,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:00:04,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:00:04,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:00:04,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:00:04,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:00:04,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:00:04,148 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 18:00:04,184 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:00:04,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:00:04,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:00:04,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:00:04,190 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:00:04,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:00:04,193 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:00:04,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:00:04,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:00:04,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:00:04,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:00:04,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:00:04,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:00:04,194 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:00:04,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:00:04,194 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:00:04,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:00:04,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:00:04,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:00:04,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:00:04,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:00:04,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:04,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:00:04,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:00:04,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:00:04,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:00:04,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:00:04,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:00:04,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:00:04,499 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:00:04,519 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:00:04,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:00:04,524 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:00:04,525 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:00:04,526 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label26.c [2019-10-13 18:00:04,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/720b04913/f43859b9f6234cf18ca89a6e07162354/FLAG6399e9ec6 [2019-10-13 18:00:05,240 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:00:05,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label26.c [2019-10-13 18:00:05,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/720b04913/f43859b9f6234cf18ca89a6e07162354/FLAG6399e9ec6 [2019-10-13 18:00:05,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/720b04913/f43859b9f6234cf18ca89a6e07162354 [2019-10-13 18:00:05,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:00:05,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:00:05,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:05,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:00:05,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:00:05,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:05" (1/1) ... [2019-10-13 18:00:05,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be7d9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:05, skipping insertion in model container [2019-10-13 18:00:05,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:05" (1/1) ... [2019-10-13 18:00:05,483 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:00:05,543 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:00:06,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:06,247 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:00:06,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:06,426 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:00:06,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:06 WrapperNode [2019-10-13 18:00:06,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:06,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:00:06,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:00:06,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:00:06,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:06" (1/1) ... [2019-10-13 18:00:06,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:06" (1/1) ... [2019-10-13 18:00:06,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:06" (1/1) ... [2019-10-13 18:00:06,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:06" (1/1) ... [2019-10-13 18:00:06,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:06" (1/1) ... [2019-10-13 18:00:06,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:06" (1/1) ... [2019-10-13 18:00:06,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:06" (1/1) ... [2019-10-13 18:00:06,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:00:06,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:00:06,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:00:06,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:00:06,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:06" (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 18:00:06,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:00:06,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:00:06,678 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:00:06,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:00:06,678 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:00:06,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:00:06,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:00:06,679 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:00:06,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:00:06,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:00:06,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:00:08,362 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:00:08,363 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:00:08,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:08 BoogieIcfgContainer [2019-10-13 18:00:08,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:00:08,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:00:08,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:00:08,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:00:08,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:05" (1/3) ... [2019-10-13 18:00:08,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5286facf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:08, skipping insertion in model container [2019-10-13 18:00:08,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:06" (2/3) ... [2019-10-13 18:00:08,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5286facf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:08, skipping insertion in model container [2019-10-13 18:00:08,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:08" (3/3) ... [2019-10-13 18:00:08,385 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label26.c [2019-10-13 18:00:08,397 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:00:08,409 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:00:08,422 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:00:08,473 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:00:08,473 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:00:08,474 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:00:08,474 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:00:08,475 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:00:08,477 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:00:08,477 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:00:08,478 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:00:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 18:00:08,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 18:00:08,514 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:08,515 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] [2019-10-13 18:00:08,517 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:08,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:08,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2020342670, now seen corresponding path program 1 times [2019-10-13 18:00:08,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:08,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551099888] [2019-10-13 18:00:08,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:08,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:08,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:09,041 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 18:00:09,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551099888] [2019-10-13 18:00:09,042 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:09,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:00:09,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100869173] [2019-10-13 18:00:09,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:09,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:09,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:09,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:09,065 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 18:00:12,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:12,375 INFO L93 Difference]: Finished difference Result 999 states and 1795 transitions. [2019-10-13 18:00:12,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:12,378 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2019-10-13 18:00:12,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:12,400 INFO L225 Difference]: With dead ends: 999 [2019-10-13 18:00:12,400 INFO L226 Difference]: Without dead ends: 639 [2019-10-13 18:00:12,411 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:12,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2019-10-13 18:00:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 621. [2019-10-13 18:00:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-10-13 18:00:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 956 transitions. [2019-10-13 18:00:12,510 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 956 transitions. Word has length 45 [2019-10-13 18:00:12,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:12,511 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 956 transitions. [2019-10-13 18:00:12,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:12,511 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 956 transitions. [2019-10-13 18:00:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 18:00:12,517 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:12,518 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:12,518 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1793518198, now seen corresponding path program 1 times [2019-10-13 18:00:12,519 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:12,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012605592] [2019-10-13 18:00:12,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:12,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:12,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:12,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012605592] [2019-10-13 18:00:12,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132469458] [2019-10-13 18:00:12,896 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 18:00:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:13,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:00:13,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:13,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:13,200 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:13,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-13 18:00:13,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976472804] [2019-10-13 18:00:13,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:13,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:13,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:13,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:00:13,207 INFO L87 Difference]: Start difference. First operand 621 states and 956 transitions. Second operand 5 states. [2019-10-13 18:00:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:15,050 INFO L93 Difference]: Finished difference Result 1833 states and 2866 transitions. [2019-10-13 18:00:15,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:00:15,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2019-10-13 18:00:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:15,060 INFO L225 Difference]: With dead ends: 1833 [2019-10-13 18:00:15,061 INFO L226 Difference]: Without dead ends: 1218 [2019-10-13 18:00:15,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:00:15,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2019-10-13 18:00:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1009. [2019-10-13 18:00:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1009 states. [2019-10-13 18:00:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1374 transitions. [2019-10-13 18:00:15,126 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1374 transitions. Word has length 119 [2019-10-13 18:00:15,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:15,127 INFO L462 AbstractCegarLoop]: Abstraction has 1009 states and 1374 transitions. [2019-10-13 18:00:15,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1374 transitions. [2019-10-13 18:00:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-10-13 18:00:15,134 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:15,135 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:15,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:15,341 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:15,342 INFO L82 PathProgramCache]: Analyzing trace with hash -373682948, now seen corresponding path program 1 times [2019-10-13 18:00:15,342 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:15,342 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599958138] [2019-10-13 18:00:15,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:15,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:15,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:00:15,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599958138] [2019-10-13 18:00:15,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917443713] [2019-10-13 18:00:15,734 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 18:00:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:15,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 18:00:15,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:15,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:15,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,972 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,993 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:15,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,350 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 48 [2019-10-13 18:00:16,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 71 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:16,603 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:00:16,603 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2019-10-13 18:00:16,603 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671335713] [2019-10-13 18:00:16,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:00:16,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:16,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:00:16,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:00:16,606 INFO L87 Difference]: Start difference. First operand 1009 states and 1374 transitions. Second operand 12 states. [2019-10-13 18:00:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:26,935 INFO L93 Difference]: Finished difference Result 5248 states and 8809 transitions. [2019-10-13 18:00:26,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-13 18:00:26,936 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 235 [2019-10-13 18:00:26,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:26,982 INFO L225 Difference]: With dead ends: 5248 [2019-10-13 18:00:26,982 INFO L226 Difference]: Without dead ends: 4433 [2019-10-13 18:00:26,990 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=465, Invalid=1605, Unknown=0, NotChecked=0, Total=2070 [2019-10-13 18:00:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2019-10-13 18:00:27,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 3189. [2019-10-13 18:00:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3189 states. [2019-10-13 18:00:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 4277 transitions. [2019-10-13 18:00:27,150 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 4277 transitions. Word has length 235 [2019-10-13 18:00:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:27,151 INFO L462 AbstractCegarLoop]: Abstraction has 3189 states and 4277 transitions. [2019-10-13 18:00:27,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:00:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 4277 transitions. [2019-10-13 18:00:27,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2019-10-13 18:00:27,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:27,166 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:27,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:27,376 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1980457565, now seen corresponding path program 1 times [2019-10-13 18:00:27,378 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:27,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383236193] [2019-10-13 18:00:27,378 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:27,379 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:27,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 278 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-13 18:00:28,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383236193] [2019-10-13 18:00:28,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702996444] [2019-10-13 18:00:28,017 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 18:00:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:28,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:28,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 280 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:00:28,297 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:00:28,297 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2019-10-13 18:00:28,298 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012910799] [2019-10-13 18:00:28,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 18:00:28,300 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:28,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 18:00:28,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-13 18:00:28,300 INFO L87 Difference]: Start difference. First operand 3189 states and 4277 transitions. Second operand 10 states. [2019-10-13 18:00:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:31,877 INFO L93 Difference]: Finished difference Result 7995 states and 11188 transitions. [2019-10-13 18:00:31,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:00:31,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 326 [2019-10-13 18:00:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:31,903 INFO L225 Difference]: With dead ends: 7995 [2019-10-13 18:00:31,904 INFO L226 Difference]: Without dead ends: 4812 [2019-10-13 18:00:31,914 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 336 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:00:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4812 states. [2019-10-13 18:00:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4812 to 4588. [2019-10-13 18:00:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4588 states. [2019-10-13 18:00:32,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 6277 transitions. [2019-10-13 18:00:32,060 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 6277 transitions. Word has length 326 [2019-10-13 18:00:32,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:32,061 INFO L462 AbstractCegarLoop]: Abstraction has 4588 states and 6277 transitions. [2019-10-13 18:00:32,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 18:00:32,062 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 6277 transitions. [2019-10-13 18:00:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2019-10-13 18:00:32,074 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:32,075 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:32,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:32,279 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:32,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:32,279 INFO L82 PathProgramCache]: Analyzing trace with hash -255883060, now seen corresponding path program 1 times [2019-10-13 18:00:32,279 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:32,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276913116] [2019-10-13 18:00:32,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:32,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:32,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 278 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-13 18:00:32,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276913116] [2019-10-13 18:00:32,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911626850] [2019-10-13 18:00:32,778 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 18:00:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:32,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 18:00:32,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:33,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 285 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:00:33,444 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:00:33,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-10-13 18:00:33,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17522749] [2019-10-13 18:00:33,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 18:00:33,445 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:33,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 18:00:33,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:00:33,446 INFO L87 Difference]: Start difference. First operand 4588 states and 6277 transitions. Second operand 13 states. [2019-10-13 18:00:37,711 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2019-10-13 18:00:38,329 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2019-10-13 18:00:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:40,433 INFO L93 Difference]: Finished difference Result 12157 states and 18255 transitions. [2019-10-13 18:00:40,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-13 18:00:40,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 331 [2019-10-13 18:00:40,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:40,477 INFO L225 Difference]: With dead ends: 12157 [2019-10-13 18:00:40,478 INFO L226 Difference]: Without dead ends: 7579 [2019-10-13 18:00:40,493 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2019-10-13 18:00:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7579 states. [2019-10-13 18:00:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7579 to 7095. [2019-10-13 18:00:40,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7095 states. [2019-10-13 18:00:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7095 states to 7095 states and 9271 transitions. [2019-10-13 18:00:40,741 INFO L78 Accepts]: Start accepts. Automaton has 7095 states and 9271 transitions. Word has length 331 [2019-10-13 18:00:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:40,742 INFO L462 AbstractCegarLoop]: Abstraction has 7095 states and 9271 transitions. [2019-10-13 18:00:40,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 18:00:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 7095 states and 9271 transitions. [2019-10-13 18:00:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2019-10-13 18:00:40,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:40,759 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:40,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:40,963 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:40,964 INFO L82 PathProgramCache]: Analyzing trace with hash 674898679, now seen corresponding path program 1 times [2019-10-13 18:00:40,965 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:40,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535615511] [2019-10-13 18:00:40,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:40,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:40,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 117 proven. 3 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-10-13 18:00:41,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535615511] [2019-10-13 18:00:41,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189395126] [2019-10-13 18:00:41,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:41,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:41,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-10-13 18:00:41,633 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:41,633 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:00:41,634 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668467313] [2019-10-13 18:00:41,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:41,636 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:41,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:41,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:00:41,636 INFO L87 Difference]: Start difference. First operand 7095 states and 9271 transitions. Second operand 3 states. [2019-10-13 18:00:42,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:42,787 INFO L93 Difference]: Finished difference Result 15108 states and 20150 transitions. [2019-10-13 18:00:42,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:42,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2019-10-13 18:00:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:42,830 INFO L225 Difference]: With dead ends: 15108 [2019-10-13 18:00:42,831 INFO L226 Difference]: Without dead ends: 8419 [2019-10-13 18:00:42,847 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:00:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states.