java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:30,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:30,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:30,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:30,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:30,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:30,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:30,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:30,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:30,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:30,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:30,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:30,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:30,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:30,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:30,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:30,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:30,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:30,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:30,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:30,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:30,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:30,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:30,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:30,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:05:30,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:30,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:30,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:30,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:30,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:30,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:30,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:30,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:30,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:30,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:30,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:30,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:05:30,693 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:30,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:30,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:30,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:30,695 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:30,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:30,695 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:30,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:30,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:30,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:30,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:30,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:30,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:30,697 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:30,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:30,697 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:30,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:30,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:30,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:30,698 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:30,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:30,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:30,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:30,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:30,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:30,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:30,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:30,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:30,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:31,000 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:31,015 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:31,020 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:31,022 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:31,022 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:31,024 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label32.c [2019-10-13 18:05:31,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e37605b3/cbf4c74dc8304ef28484453d4db2f96b/FLAGe9686bf5a [2019-10-13 18:05:31,776 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:31,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label32.c [2019-10-13 18:05:31,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e37605b3/cbf4c74dc8304ef28484453d4db2f96b/FLAGe9686bf5a [2019-10-13 18:05:31,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e37605b3/cbf4c74dc8304ef28484453d4db2f96b [2019-10-13 18:05:31,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:31,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:31,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:31,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:31,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:31,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:31" (1/1) ... [2019-10-13 18:05:31,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1348e435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:31, skipping insertion in model container [2019-10-13 18:05:31,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:31" (1/1) ... [2019-10-13 18:05:32,002 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:32,074 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:32,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:32,872 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:33,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:33,261 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:33,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:33 WrapperNode [2019-10-13 18:05:33,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:33,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:33,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:33,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:33,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:33" (1/1) ... [2019-10-13 18:05:33,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:33" (1/1) ... [2019-10-13 18:05:33,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:33" (1/1) ... [2019-10-13 18:05:33,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:33" (1/1) ... [2019-10-13 18:05:33,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:33" (1/1) ... [2019-10-13 18:05:33,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:33" (1/1) ... [2019-10-13 18:05:33,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:33" (1/1) ... [2019-10-13 18:05:33,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:33,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:33,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:33,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:33,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:33,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:33,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:33,507 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:33,507 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:33,507 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:33,507 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:33,507 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:33,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:35,797 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:35,797 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:35,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:35 BoogieIcfgContainer [2019-10-13 18:05:35,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:35,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:35,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:35,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:35,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:31" (1/3) ... [2019-10-13 18:05:35,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c64a28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:35, skipping insertion in model container [2019-10-13 18:05:35,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:33" (2/3) ... [2019-10-13 18:05:35,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c64a28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:35, skipping insertion in model container [2019-10-13 18:05:35,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:35" (3/3) ... [2019-10-13 18:05:35,811 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label32.c [2019-10-13 18:05:35,822 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:35,834 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:35,847 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:35,896 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:35,896 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:35,897 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:35,897 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:35,897 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:35,897 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:35,897 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:35,897 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 18:05:35,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:35,948 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:35,950 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:35,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:35,957 INFO L82 PathProgramCache]: Analyzing trace with hash -808797987, now seen corresponding path program 1 times [2019-10-13 18:05:35,966 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:35,966 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031715536] [2019-10-13 18:05:35,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:35,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:35,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:36,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031715536] [2019-10-13 18:05:36,437 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:36,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:36,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822419734] [2019-10-13 18:05:36,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:36,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:36,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:36,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:36,459 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:41,699 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-10-13 18:05:41,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:41,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-10-13 18:05:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:41,739 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:41,740 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:41,754 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 18:05:41,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:41,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-10-13 18:05:41,874 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 54 [2019-10-13 18:05:41,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:41,875 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-10-13 18:05:41,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:41,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-10-13 18:05:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-13 18:05:41,885 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:41,886 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:41,886 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:41,887 INFO L82 PathProgramCache]: Analyzing trace with hash -975333715, now seen corresponding path program 1 times [2019-10-13 18:05:41,887 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:41,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505140753] [2019-10-13 18:05:41,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:41,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:41,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:42,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505140753] [2019-10-13 18:05:42,346 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:42,346 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:05:42,346 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638864402] [2019-10-13 18:05:42,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:05:42,352 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:42,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:05:42,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:42,353 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-10-13 18:05:47,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:47,503 INFO L93 Difference]: Finished difference Result 3125 states and 5015 transitions. [2019-10-13 18:05:47,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:05:47,504 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 189 [2019-10-13 18:05:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:47,519 INFO L225 Difference]: With dead ends: 3125 [2019-10-13 18:05:47,520 INFO L226 Difference]: Without dead ends: 2100 [2019-10-13 18:05:47,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:05:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-10-13 18:05:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2069. [2019-10-13 18:05:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2019-10-13 18:05:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3146 transitions. [2019-10-13 18:05:47,628 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3146 transitions. Word has length 189 [2019-10-13 18:05:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:47,632 INFO L462 AbstractCegarLoop]: Abstraction has 2069 states and 3146 transitions. [2019-10-13 18:05:47,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:05:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3146 transitions. [2019-10-13 18:05:47,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-10-13 18:05:47,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:47,645 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:47,645 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:47,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1806940737, now seen corresponding path program 1 times [2019-10-13 18:05:47,647 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:47,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026956588] [2019-10-13 18:05:47,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:47,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:47,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 94 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:48,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026956588] [2019-10-13 18:05:48,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906585708] [2019-10-13 18:05:48,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:48,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 18:05:48,264 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:48,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:48,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526278346] [2019-10-13 18:05:48,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:48,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:48,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:48,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:48,267 INFO L87 Difference]: Start difference. First operand 2069 states and 3146 transitions. Second operand 5 states. [2019-10-13 18:05:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:50,808 INFO L93 Difference]: Finished difference Result 5192 states and 7967 transitions. [2019-10-13 18:05:50,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:05:50,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2019-10-13 18:05:50,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:50,840 INFO L225 Difference]: With dead ends: 5192 [2019-10-13 18:05:50,840 INFO L226 Difference]: Without dead ends: 3129 [2019-10-13 18:05:50,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:50,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2019-10-13 18:05:50,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3097. [2019-10-13 18:05:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3097 states. [2019-10-13 18:05:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 3988 transitions. [2019-10-13 18:05:50,934 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 3988 transitions. Word has length 224 [2019-10-13 18:05:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:50,935 INFO L462 AbstractCegarLoop]: Abstraction has 3097 states and 3988 transitions. [2019-10-13 18:05:50,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 3988 transitions. [2019-10-13 18:05:50,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2019-10-13 18:05:50,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:50,943 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:51,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:51,151 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:51,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:51,151 INFO L82 PathProgramCache]: Analyzing trace with hash 484513891, now seen corresponding path program 1 times [2019-10-13 18:05:51,152 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:51,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265240985] [2019-10-13 18:05:51,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:51,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:51,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 214 proven. 71 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-13 18:05:51,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265240985] [2019-10-13 18:05:51,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284332188] [2019-10-13 18:05:51,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:51,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:51,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 18:05:51,865 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:51,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:05:51,865 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491833446] [2019-10-13 18:05:51,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:51,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:51,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:51,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:51,867 INFO L87 Difference]: Start difference. First operand 3097 states and 3988 transitions. Second operand 11 states. [2019-10-13 18:05:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:59,755 INFO L93 Difference]: Finished difference Result 10419 states and 14042 transitions. [2019-10-13 18:05:59,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 18:05:59,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 333 [2019-10-13 18:05:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:59,797 INFO L225 Difference]: With dead ends: 10419 [2019-10-13 18:05:59,797 INFO L226 Difference]: Without dead ends: 6317 [2019-10-13 18:05:59,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:05:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2019-10-13 18:05:59,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 5938. [2019-10-13 18:05:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5938 states. [2019-10-13 18:06:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5938 states to 5938 states and 7568 transitions. [2019-10-13 18:06:00,010 INFO L78 Accepts]: Start accepts. Automaton has 5938 states and 7568 transitions. Word has length 333 [2019-10-13 18:06:00,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:00,012 INFO L462 AbstractCegarLoop]: Abstraction has 5938 states and 7568 transitions. [2019-10-13 18:06:00,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:06:00,012 INFO L276 IsEmpty]: Start isEmpty. Operand 5938 states and 7568 transitions. [2019-10-13 18:06:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2019-10-13 18:06:00,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:00,036 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:00,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:00,241 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:00,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1099514412, now seen corresponding path program 1 times [2019-10-13 18:06:00,241 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:00,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308630148] [2019-10-13 18:06:00,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:00,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:00,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 233 proven. 115 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-13 18:06:01,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308630148] [2019-10-13 18:06:01,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873571410] [2019-10-13 18:06:01,502 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 18:06:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:01,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:01,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 389 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 18:06:01,857 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:01,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:06:01,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797105267] [2019-10-13 18:06:01,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:01,858 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:01,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:01,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:01,859 INFO L87 Difference]: Start difference. First operand 5938 states and 7568 transitions. Second operand 11 states. [2019-10-13 18:06:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:07,324 INFO L93 Difference]: Finished difference Result 13329 states and 17710 transitions. [2019-10-13 18:06:07,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:06:07,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 534 [2019-10-13 18:06:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:07,367 INFO L225 Difference]: With dead ends: 13329 [2019-10-13 18:06:07,367 INFO L226 Difference]: Without dead ends: 7009 [2019-10-13 18:06:07,394 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-10-13 18:06:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7009 states. [2019-10-13 18:06:07,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7009 to 6971. [2019-10-13 18:06:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6971 states. [2019-10-13 18:06:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6971 states to 6971 states and 7945 transitions. [2019-10-13 18:06:07,583 INFO L78 Accepts]: Start accepts. Automaton has 6971 states and 7945 transitions. Word has length 534 [2019-10-13 18:06:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:07,584 INFO L462 AbstractCegarLoop]: Abstraction has 6971 states and 7945 transitions. [2019-10-13 18:06:07,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:06:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 6971 states and 7945 transitions. [2019-10-13 18:06:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 763 [2019-10-13 18:06:07,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:07,617 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 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] [2019-10-13 18:06:07,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:07,822 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:07,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:07,822 INFO L82 PathProgramCache]: Analyzing trace with hash 211394213, now seen corresponding path program 1 times [2019-10-13 18:06:07,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:07,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081997336] [2019-10-13 18:06:07,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:07,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:07,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1928 backedges. 395 proven. 460 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2019-10-13 18:06:09,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081997336] [2019-10-13 18:06:09,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555689814] [2019-10-13 18:06:09,208 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 18:06:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:09,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:09,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1928 backedges. 1349 proven. 2 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2019-10-13 18:06:09,836 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:09,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 18:06:09,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477927523] [2019-10-13 18:06:09,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:06:09,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:09,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:06:09,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:06:09,839 INFO L87 Difference]: Start difference. First operand 6971 states and 7945 transitions. Second operand 12 states.