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_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:03:48,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:03:48,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:03:48,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:03:48,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:03:48,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:03:48,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:03:48,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:03:48,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:03:48,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:03:48,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:03:48,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:03:48,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:03:48,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:03:48,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:03:48,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:03:48,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:03:48,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:03:48,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:03:48,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:03:48,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:03:48,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:03:48,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:03:48,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:03:48,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:03:48,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:03:48,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:03:48,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:03:48,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:03:48,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:03:48,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:03:48,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:03:48,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:03:48,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:03:48,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:03:48,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:03:48,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:03:48,754 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:03:48,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:03:48,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:03:48,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:03:48,759 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:03:48,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:03:48,760 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:03:48,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:03:48,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:03:48,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:03:48,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:03:48,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:03:48,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:03:48,762 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:03:48,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:03:48,762 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:03:48,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:03:48,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:03:48,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:03:48,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:03:48,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:03:48,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:03:48,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:03:48,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:03:48,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:03:48,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:03:48,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:03:48,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:03:48,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:03:49,054 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:03:49,070 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:03:49,074 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:03:49,076 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:03:49,076 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:03:49,077 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label09.c [2019-10-14 22:03:49,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d10e675aa/1e8d71fa3ac945e685eaaa118fecfc40/FLAG890a05094 [2019-10-14 22:03:49,751 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:03:49,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label09.c [2019-10-14 22:03:49,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d10e675aa/1e8d71fa3ac945e685eaaa118fecfc40/FLAG890a05094 [2019-10-14 22:03:50,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d10e675aa/1e8d71fa3ac945e685eaaa118fecfc40 [2019-10-14 22:03:50,022 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:03:50,024 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:03:50,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:50,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:03:50,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:03:50,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:50" (1/1) ... [2019-10-14 22:03:50,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760969a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:50, skipping insertion in model container [2019-10-14 22:03:50,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:50" (1/1) ... [2019-10-14 22:03:50,042 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:03:50,128 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:03:50,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:50,960 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:03:51,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:51,644 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:03:51,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:51 WrapperNode [2019-10-14 22:03:51,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:51,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:03:51,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:03:51,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:03:51,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:51" (1/1) ... [2019-10-14 22:03:51,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:51" (1/1) ... [2019-10-14 22:03:51,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:51" (1/1) ... [2019-10-14 22:03:51,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:51" (1/1) ... [2019-10-14 22:03:51,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:51" (1/1) ... [2019-10-14 22:03:51,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:51" (1/1) ... [2019-10-14 22:03:51,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:51" (1/1) ... [2019-10-14 22:03:51,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:03:51,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:03:51,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:03:51,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:03:51,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:03:51,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:03:51,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:03:51,967 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:03:51,967 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:03:51,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:03:51,968 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:03:51,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:03:51,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:03:51,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:03:51,969 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:03:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:03:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:03:51,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:03:54,398 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:03:54,399 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:03:54,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:54 BoogieIcfgContainer [2019-10-14 22:03:54,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:03:54,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:03:54,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:03:54,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:03:54,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:03:50" (1/3) ... [2019-10-14 22:03:54,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557dad3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:54, skipping insertion in model container [2019-10-14 22:03:54,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:51" (2/3) ... [2019-10-14 22:03:54,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557dad3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:54, skipping insertion in model container [2019-10-14 22:03:54,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:54" (3/3) ... [2019-10-14 22:03:54,421 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label09.c [2019-10-14 22:03:54,433 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:03:54,444 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:03:54,456 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:03:54,497 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:03:54,497 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:03:54,498 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:03:54,498 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:03:54,498 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:03:54,498 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:03:54,498 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:03:54,498 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:03:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:03:54,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 22:03:54,546 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:54,548 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] [2019-10-14 22:03:54,549 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:54,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1688658390, now seen corresponding path program 1 times [2019-10-14 22:03:54,565 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:54,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522752741] [2019-10-14 22:03:54,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:54,566 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:54,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:54,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522752741] [2019-10-14 22:03:55,000 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:55,000 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:03:55,000 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602092300] [2019-10-14 22:03:55,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:03:55,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:55,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:03:55,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:03:55,023 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:04:00,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:00,559 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-10-14 22:04:00,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:04:00,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2019-10-14 22:04:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:00,595 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:04:00,595 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:04:00,604 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:04:00,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:04:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:04:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-10-14 22:04:00,751 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 53 [2019-10-14 22:04:00,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:00,755 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-10-14 22:04:00,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:00,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-10-14 22:04:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 22:04:00,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:00,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:00,780 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:00,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:00,782 INFO L82 PathProgramCache]: Analyzing trace with hash -192851661, now seen corresponding path program 1 times [2019-10-14 22:04:00,782 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:00,783 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871462615] [2019-10-14 22:04:00,783 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:00,783 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:00,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:01,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871462615] [2019-10-14 22:04:01,216 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:01,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:04:01,216 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270335159] [2019-10-14 22:04:01,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:04:01,221 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:01,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:04:01,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:01,222 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-10-14 22:04:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:05,576 INFO L93 Difference]: Finished difference Result 3118 states and 4964 transitions. [2019-10-14 22:04:05,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:04:05,578 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 136 [2019-10-14 22:04:05,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:05,594 INFO L225 Difference]: With dead ends: 3118 [2019-10-14 22:04:05,594 INFO L226 Difference]: Without dead ends: 2093 [2019-10-14 22:04:05,598 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 [2019-10-14 22:04:05,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2019-10-14 22:04:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2075. [2019-10-14 22:04:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2075 states. [2019-10-14 22:04:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2956 transitions. [2019-10-14 22:04:05,700 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2956 transitions. Word has length 136 [2019-10-14 22:04:05,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:05,703 INFO L462 AbstractCegarLoop]: Abstraction has 2075 states and 2956 transitions. [2019-10-14 22:04:05,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:04:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2956 transitions. [2019-10-14 22:04:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-14 22:04:05,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:05,714 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:05,714 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1084580230, now seen corresponding path program 1 times [2019-10-14 22:04:05,717 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:05,717 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609052771] [2019-10-14 22:04:05,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:05,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:05,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:04:06,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609052771] [2019-10-14 22:04:06,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941940063] [2019-10-14 22:04:06,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:06,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:06,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:06,325 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:06,325 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-14 22:04:06,325 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620316905] [2019-10-14 22:04:06,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:04:06,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:06,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:04:06,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:04:06,337 INFO L87 Difference]: Start difference. First operand 2075 states and 2956 transitions. Second operand 3 states. [2019-10-14 22:04:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:08,529 INFO L93 Difference]: Finished difference Result 3102 states and 4277 transitions. [2019-10-14 22:04:08,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:04:08,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2019-10-14 22:04:08,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:08,552 INFO L225 Difference]: With dead ends: 3102 [2019-10-14 22:04:08,553 INFO L226 Difference]: Without dead ends: 3100 [2019-10-14 22:04:08,555 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:04:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2019-10-14 22:04:08,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2755. [2019-10-14 22:04:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2755 states. [2019-10-14 22:04:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 3884 transitions. [2019-10-14 22:04:08,666 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 3884 transitions. Word has length 153 [2019-10-14 22:04:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:08,668 INFO L462 AbstractCegarLoop]: Abstraction has 2755 states and 3884 transitions. [2019-10-14 22:04:08,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:04:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 3884 transitions. [2019-10-14 22:04:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-10-14 22:04:08,673 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:08,674 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:08,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:08,879 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:08,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:08,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1887084183, now seen corresponding path program 1 times [2019-10-14 22:04:08,879 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:08,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425374591] [2019-10-14 22:04:08,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:08,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:08,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 22:04:09,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425374591] [2019-10-14 22:04:09,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073039599] [2019-10-14 22:04:09,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:09,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:09,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:09,612 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:09,612 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 22:04:09,612 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122431972] [2019-10-14 22:04:09,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:04:09,614 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:09,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:04:09,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:09,615 INFO L87 Difference]: Start difference. First operand 2755 states and 3884 transitions. Second operand 12 states. [2019-10-14 22:04:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:17,371 INFO L93 Difference]: Finished difference Result 7991 states and 11355 transitions. [2019-10-14 22:04:17,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 22:04:17,372 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 268 [2019-10-14 22:04:17,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:17,404 INFO L225 Difference]: With dead ends: 7991 [2019-10-14 22:04:17,404 INFO L226 Difference]: Without dead ends: 5242 [2019-10-14 22:04:17,411 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 275 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:04:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2019-10-14 22:04:17,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4510. [2019-10-14 22:04:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4510 states. [2019-10-14 22:04:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 5583 transitions. [2019-10-14 22:04:17,550 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 5583 transitions. Word has length 268 [2019-10-14 22:04:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:17,552 INFO L462 AbstractCegarLoop]: Abstraction has 4510 states and 5583 transitions. [2019-10-14 22:04:17,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:04:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 5583 transitions. [2019-10-14 22:04:17,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2019-10-14 22:04:17,572 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:17,573 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:17,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:17,778 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:17,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:17,779 INFO L82 PathProgramCache]: Analyzing trace with hash 273677087, now seen corresponding path program 1 times [2019-10-14 22:04:17,779 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:17,780 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456578165] [2019-10-14 22:04:17,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:17,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:17,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 515 proven. 2 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2019-10-14 22:04:18,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456578165] [2019-10-14 22:04:18,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570986393] [2019-10-14 22:04:18,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:19,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:19,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 518 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2019-10-14 22:04:19,399 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:19,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:04:19,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576003123] [2019-10-14 22:04:19,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:19,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:19,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:19,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:19,402 INFO L87 Difference]: Start difference. First operand 4510 states and 5583 transitions. Second operand 11 states. [2019-10-14 22:04:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:26,189 INFO L93 Difference]: Finished difference Result 10080 states and 12704 transitions. [2019-10-14 22:04:26,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 22:04:26,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 622 [2019-10-14 22:04:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:26,213 INFO L225 Difference]: With dead ends: 10080 [2019-10-14 22:04:26,214 INFO L226 Difference]: Without dead ends: 5576 [2019-10-14 22:04:26,223 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:04:26,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2019-10-14 22:04:26,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 5560. [2019-10-14 22:04:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5560 states. [2019-10-14 22:04:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 6810 transitions. [2019-10-14 22:04:26,361 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 6810 transitions. Word has length 622 [2019-10-14 22:04:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:26,362 INFO L462 AbstractCegarLoop]: Abstraction has 5560 states and 6810 transitions. [2019-10-14 22:04:26,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:04:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 6810 transitions. [2019-10-14 22:04:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2019-10-14 22:04:26,386 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:26,387 INFO L380 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]