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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:25,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:25,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:25,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:25,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:25,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:25,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:25,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:25,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:25,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:25,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:25,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:25,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:25,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:25,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:25,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:25,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:25,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:25,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:25,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:25,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:25,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:25,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:25,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:25,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:07:25,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:07:25,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:07:25,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:07:25,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:07:25,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:07:25,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:07:25,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:07:25,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:07:25,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:25,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:25,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:25,718 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 20:07:25,743 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:25,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:25,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:25,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:25,746 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:25,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:25,747 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:25,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:25,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:25,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:25,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:25,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:25,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:25,749 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:25,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:25,750 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:25,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:25,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:25,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:25,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:25,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:25,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:25,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:25,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:25,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:25,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:25,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:25,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:25,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:07:26,046 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:26,062 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:26,066 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:26,068 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:26,069 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:26,070 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label43.c [2019-10-13 20:07:26,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5760def38/bbfcae903c9046a38c74f01520106dc0/FLAG08fd82a47 [2019-10-13 20:07:26,734 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:26,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label43.c [2019-10-13 20:07:26,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5760def38/bbfcae903c9046a38c74f01520106dc0/FLAG08fd82a47 [2019-10-13 20:07:27,029 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5760def38/bbfcae903c9046a38c74f01520106dc0 [2019-10-13 20:07:27,039 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:27,041 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:27,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:27,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:27,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:27,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:27" (1/1) ... [2019-10-13 20:07:27,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e4cadf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:27, skipping insertion in model container [2019-10-13 20:07:27,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:27" (1/1) ... [2019-10-13 20:07:27,060 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:27,116 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:27,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:27,717 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:27,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:27,899 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:27,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:27 WrapperNode [2019-10-13 20:07:27,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:27,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:27,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:27,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:27,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:27" (1/1) ... [2019-10-13 20:07:27,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:27" (1/1) ... [2019-10-13 20:07:27,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:27" (1/1) ... [2019-10-13 20:07:27,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:27" (1/1) ... [2019-10-13 20:07:27,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:27" (1/1) ... [2019-10-13 20:07:28,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:27" (1/1) ... [2019-10-13 20:07:28,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:27" (1/1) ... [2019-10-13 20:07:28,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:28,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:28,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:28,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:28,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:27" (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 20:07:28,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:28,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:28,110 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:28,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:28,110 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:28,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:28,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:28,111 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:28,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:28,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:28,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:29,531 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:29,532 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:29,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:29 BoogieIcfgContainer [2019-10-13 20:07:29,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:29,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:29,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:29,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:29,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:27" (1/3) ... [2019-10-13 20:07:29,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46055a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:29, skipping insertion in model container [2019-10-13 20:07:29,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:27" (2/3) ... [2019-10-13 20:07:29,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46055a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:29, skipping insertion in model container [2019-10-13 20:07:29,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:29" (3/3) ... [2019-10-13 20:07:29,546 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label43.c [2019-10-13 20:07:29,558 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:29,567 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:29,579 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:29,608 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:29,609 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:29,609 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:29,609 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:29,609 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:29,610 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:29,610 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:29,610 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:29,640 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:29,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 20:07:29,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:29,649 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] [2019-10-13 20:07:29,651 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:29,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1143384842, now seen corresponding path program 1 times [2019-10-13 20:07:29,671 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:29,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784904051] [2019-10-13 20:07:29,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:29,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:29,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:29,990 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 20:07:29,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784904051] [2019-10-13 20:07:29,995 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:29,995 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:29,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255434710] [2019-10-13 20:07:30,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:30,003 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:30,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:30,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:30,021 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:07:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:31,285 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-13 20:07:31,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:07:31,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-10-13 20:07:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:31,304 INFO L225 Difference]: With dead ends: 688 [2019-10-13 20:07:31,304 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:07:31,311 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:31,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:07:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:07:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:07:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-13 20:07:31,427 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 21 [2019-10-13 20:07:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:31,428 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-13 20:07:31,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:07:31,428 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-13 20:07:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 20:07:31,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:31,434 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:07:31,434 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:31,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:31,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1758836454, now seen corresponding path program 1 times [2019-10-13 20:07:31,435 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:31,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290982519] [2019-10-13 20:07:31,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:31,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:31,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:31,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290982519] [2019-10-13 20:07:31,727 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:31,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:07:31,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740653052] [2019-10-13 20:07:31,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:07:31,731 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:31,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:07:31,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:07:31,732 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-13 20:07:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:32,971 INFO L93 Difference]: Finished difference Result 936 states and 1526 transitions. [2019-10-13 20:07:32,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:07:32,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2019-10-13 20:07:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:32,980 INFO L225 Difference]: With dead ends: 936 [2019-10-13 20:07:32,980 INFO L226 Difference]: Without dead ends: 570 [2019-10-13 20:07:32,982 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:07:32,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-10-13 20:07:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-10-13 20:07:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-10-13 20:07:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-10-13 20:07:33,013 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 107 [2019-10-13 20:07:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:33,014 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-10-13 20:07:33,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:07:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-10-13 20:07:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 20:07:33,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:33,017 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:07:33,018 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:33,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1887369717, now seen corresponding path program 1 times [2019-10-13 20:07:33,018 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:33,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366333621] [2019-10-13 20:07:33,019 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:33,019 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:33,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:33,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366333621] [2019-10-13 20:07:33,151 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:33,151 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:33,152 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64734911] [2019-10-13 20:07:33,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:33,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:33,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:33,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:33,154 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-10-13 20:07:34,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:34,787 INFO L93 Difference]: Finished difference Result 2218 states and 3275 transitions. [2019-10-13 20:07:34,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:34,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-10-13 20:07:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:34,800 INFO L225 Difference]: With dead ends: 2218 [2019-10-13 20:07:34,800 INFO L226 Difference]: Without dead ends: 1662 [2019-10-13 20:07:34,803 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:34,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-10-13 20:07:34,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1478. [2019-10-13 20:07:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1478 states. [2019-10-13 20:07:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 2054 transitions. [2019-10-13 20:07:34,866 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 2054 transitions. Word has length 116 [2019-10-13 20:07:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:34,867 INFO L462 AbstractCegarLoop]: Abstraction has 1478 states and 2054 transitions. [2019-10-13 20:07:34,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 2054 transitions. [2019-10-13 20:07:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-13 20:07:34,873 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:34,874 INFO L380 BasicCegarLoop]: trace histogram [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, 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 20:07:34,874 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:34,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:34,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1771960234, now seen corresponding path program 1 times [2019-10-13 20:07:34,875 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:34,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818109084] [2019-10-13 20:07:34,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:34,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:34,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:35,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818109084] [2019-10-13 20:07:35,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983064992] [2019-10-13 20:07:35,773 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 20:07:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:35,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:07:35,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:35,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 20:07:36,138 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:36,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:36,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:36,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:36,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:36,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:36,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:36,680 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:07:36,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2019-10-13 20:07:36,681 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89303828] [2019-10-13 20:07:36,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:36,682 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:36,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:36,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-10-13 20:07:36,683 INFO L87 Difference]: Start difference. First operand 1478 states and 2054 transitions. Second operand 5 states. [2019-10-13 20:07:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:38,081 INFO L93 Difference]: Finished difference Result 3166 states and 4435 transitions. [2019-10-13 20:07:38,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:07:38,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 219 [2019-10-13 20:07:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:38,097 INFO L225 Difference]: With dead ends: 3166 [2019-10-13 20:07:38,097 INFO L226 Difference]: Without dead ends: 1694 [2019-10-13 20:07:38,102 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 433 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-10-13 20:07:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2019-10-13 20:07:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1310. [2019-10-13 20:07:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2019-10-13 20:07:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1749 transitions. [2019-10-13 20:07:38,170 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1749 transitions. Word has length 219 [2019-10-13 20:07:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:38,171 INFO L462 AbstractCegarLoop]: Abstraction has 1310 states and 1749 transitions. [2019-10-13 20:07:38,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:07:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1749 transitions. [2019-10-13 20:07:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-10-13 20:07:38,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:38,178 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:07:38,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:38,384 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1331053746, now seen corresponding path program 1 times [2019-10-13 20:07:38,386 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:38,386 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490680772] [2019-10-13 20:07:38,387 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:38,387 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:38,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 128 proven. 164 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:39,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490680772] [2019-10-13 20:07:39,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641398414] [2019-10-13 20:07:39,489 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 20:07:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:39,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:07:39,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:39,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 228 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 20:07:39,896 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:39,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 50 proven. 242 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:40,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2139267513] [2019-10-13 20:07:40,411 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 304 [2019-10-13 20:07:40,476 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:07:40,476 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:07:53,819 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:07:53,821 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 485 root evaluator evaluations with a maximum evaluation depth of 13. Performed 485 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:07:53,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:53,825 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:07:58,204 INFO L227 lantSequenceWeakener]: Weakened 300 states. On average, predicates are now at 77.34% of their original sizes. [2019-10-13 20:07:58,205 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:07:58,284 INFO L553 sIntCurrentIteration]: We unified 302 AI predicates to 302 [2019-10-13 20:07:58,284 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:07:58,285 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:07:58,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-13 20:07:58,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519067469] [2019-10-13 20:07:58,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 20:07:58,288 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:58,288 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:07:58,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 20:07:58,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:07:58,288 INFO L87 Difference]: Start difference. First operand 1310 states and 1749 transitions. Second operand 11 states.