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/Problem11_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:05:13,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:05:13,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:05:13,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:05:13,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:05:13,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:05:13,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:05:13,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:05:13,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:05:13,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:05:13,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:05:13,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:05:13,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:05:13,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:05:13,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:05:13,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:05:13,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:05:13,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:05:13,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:05:13,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:05:13,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:05:13,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:05:13,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:05:13,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:05:13,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:05:13,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:05:13,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:05:13,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:05:13,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:05:13,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:05:13,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:05:13,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:05:13,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:05:13,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:05:13,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:05:13,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:05:13,526 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 20:05:13,548 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:05:13,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:05:13,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:05:13,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:05:13,554 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:05:13,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:05:13,554 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:05:13,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:05:13,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:05:13,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:05:13,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:05:13,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:05:13,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:05:13,557 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:05:13,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:05:13,557 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:05:13,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:05:13,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:05:13,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:05:13,558 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:05:13,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:05:13,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:13,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:05:13,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:05:13,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:05:13,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:05:13,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:05:13,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:05:13,560 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 20:05:13,841 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:05:13,854 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:05:13,857 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:05:13,859 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:05:13,859 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:05:13,860 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54.c [2019-10-13 20:05:13,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e303513c9/e97ae10ea7ac4ab2ade5c5cf9a7cfd32/FLAG3b5e731d5 [2019-10-13 20:05:14,576 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:05:14,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label54.c [2019-10-13 20:05:14,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e303513c9/e97ae10ea7ac4ab2ade5c5cf9a7cfd32/FLAG3b5e731d5 [2019-10-13 20:05:14,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e303513c9/e97ae10ea7ac4ab2ade5c5cf9a7cfd32 [2019-10-13 20:05:14,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:05:14,868 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:05:14,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:14,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:05:14,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:05:14,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:14" (1/1) ... [2019-10-13 20:05:14,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34517c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:14, skipping insertion in model container [2019-10-13 20:05:14,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:14" (1/1) ... [2019-10-13 20:05:14,884 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:05:14,947 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:05:15,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:15,612 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:05:15,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:15,856 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:05:15,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:15 WrapperNode [2019-10-13 20:05:15,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:15,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:05:15,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:05:15,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:05:15,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:15" (1/1) ... [2019-10-13 20:05:15,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:15" (1/1) ... [2019-10-13 20:05:15,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:15" (1/1) ... [2019-10-13 20:05:15,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:15" (1/1) ... [2019-10-13 20:05:15,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:15" (1/1) ... [2019-10-13 20:05:16,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:15" (1/1) ... [2019-10-13 20:05:16,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:15" (1/1) ... [2019-10-13 20:05:16,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:05:16,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:05:16,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:05:16,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:05:16,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:15" (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 20:05:16,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:05:16,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:05:16,116 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:05:16,116 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:05:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:05:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:05:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:05:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:05:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:05:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:05:16,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:05:17,921 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:05:17,921 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:05:17,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:17 BoogieIcfgContainer [2019-10-13 20:05:17,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:05:17,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:05:17,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:05:17,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:05:17,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:05:14" (1/3) ... [2019-10-13 20:05:17,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4135b719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:17, skipping insertion in model container [2019-10-13 20:05:17,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:15" (2/3) ... [2019-10-13 20:05:17,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4135b719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:17, skipping insertion in model container [2019-10-13 20:05:17,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:17" (3/3) ... [2019-10-13 20:05:17,933 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label54.c [2019-10-13 20:05:17,945 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:05:17,955 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:05:17,968 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:05:18,001 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:05:18,001 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:05:18,001 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:05:18,002 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:05:18,002 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:05:18,002 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:05:18,002 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:05:18,003 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:05:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:05:18,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 20:05:18,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:18,074 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] [2019-10-13 20:05:18,075 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:18,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:18,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1043442102, now seen corresponding path program 1 times [2019-10-13 20:05:18,091 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:18,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848682073] [2019-10-13 20:05:18,092 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:18,092 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:18,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:18,525 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 20:05:18,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848682073] [2019-10-13 20:05:18,527 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:18,528 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:18,528 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280878537] [2019-10-13 20:05:18,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:18,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:18,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:18,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:18,554 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-13 20:05:20,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:20,830 INFO L93 Difference]: Finished difference Result 994 states and 1776 transitions. [2019-10-13 20:05:20,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:20,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-13 20:05:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:20,854 INFO L225 Difference]: With dead ends: 994 [2019-10-13 20:05:20,854 INFO L226 Difference]: Without dead ends: 620 [2019-10-13 20:05:20,862 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 20:05:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-13 20:05:20,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 614. [2019-10-13 20:05:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-10-13 20:05:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 908 transitions. [2019-10-13 20:05:20,968 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 908 transitions. Word has length 43 [2019-10-13 20:05:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:20,969 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 908 transitions. [2019-10-13 20:05:20,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 908 transitions. [2019-10-13 20:05:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 20:05:20,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:20,980 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:05:20,981 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:20,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:20,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2051275321, now seen corresponding path program 1 times [2019-10-13 20:05:20,983 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:20,983 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232928354] [2019-10-13 20:05:20,983 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:20,984 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:20,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:21,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232928354] [2019-10-13 20:05:21,279 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:21,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:21,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500736555] [2019-10-13 20:05:21,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:21,285 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:21,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:21,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:21,286 INFO L87 Difference]: Start difference. First operand 614 states and 908 transitions. Second operand 4 states. [2019-10-13 20:05:23,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:23,200 INFO L93 Difference]: Finished difference Result 2367 states and 3579 transitions. [2019-10-13 20:05:23,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:23,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-10-13 20:05:23,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:23,212 INFO L225 Difference]: With dead ends: 2367 [2019-10-13 20:05:23,212 INFO L226 Difference]: Without dead ends: 1759 [2019-10-13 20:05:23,215 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 20:05:23,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2019-10-13 20:05:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1183. [2019-10-13 20:05:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1183 states. [2019-10-13 20:05:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1681 transitions. [2019-10-13 20:05:23,288 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1681 transitions. Word has length 116 [2019-10-13 20:05:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:23,289 INFO L462 AbstractCegarLoop]: Abstraction has 1183 states and 1681 transitions. [2019-10-13 20:05:23,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1681 transitions. [2019-10-13 20:05:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 20:05:23,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:23,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:05:23,297 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:23,297 INFO L82 PathProgramCache]: Analyzing trace with hash -442913762, now seen corresponding path program 1 times [2019-10-13 20:05:23,298 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:23,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295950672] [2019-10-13 20:05:23,298 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:23,298 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:23,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:23,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295950672] [2019-10-13 20:05:23,591 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:23,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:23,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161363705] [2019-10-13 20:05:23,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:23,595 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:23,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:23,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:23,597 INFO L87 Difference]: Start difference. First operand 1183 states and 1681 transitions. Second operand 6 states. [2019-10-13 20:05:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:26,132 INFO L93 Difference]: Finished difference Result 3648 states and 5882 transitions. [2019-10-13 20:05:26,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 20:05:26,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-13 20:05:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:26,157 INFO L225 Difference]: With dead ends: 3648 [2019-10-13 20:05:26,157 INFO L226 Difference]: Without dead ends: 2471 [2019-10-13 20:05:26,163 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:05:26,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-10-13 20:05:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2397. [2019-10-13 20:05:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2397 states. [2019-10-13 20:05:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3442 transitions. [2019-10-13 20:05:26,304 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3442 transitions. Word has length 141 [2019-10-13 20:05:26,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:26,306 INFO L462 AbstractCegarLoop]: Abstraction has 2397 states and 3442 transitions. [2019-10-13 20:05:26,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:05:26,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3442 transitions. [2019-10-13 20:05:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-10-13 20:05:26,314 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:26,315 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:05:26,315 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:26,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1861817831, now seen corresponding path program 1 times [2019-10-13 20:05:26,316 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:26,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039068996] [2019-10-13 20:05:26,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:26,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:26,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:05:26,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039068996] [2019-10-13 20:05:26,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544470285] [2019-10-13 20:05:26,552 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 20:05:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:26,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:05:26,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 20:05:26,829 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:05:26,961 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:05:26,961 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:05:26,962 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058853017] [2019-10-13 20:05:26,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:05:26,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:26,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:05:26,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:05:26,963 INFO L87 Difference]: Start difference. First operand 2397 states and 3442 transitions. Second operand 5 states. [2019-10-13 20:05:28,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:28,529 INFO L93 Difference]: Finished difference Result 7053 states and 11357 transitions. [2019-10-13 20:05:28,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:05:28,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 204 [2019-10-13 20:05:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:28,575 INFO L225 Difference]: With dead ends: 7053 [2019-10-13 20:05:28,575 INFO L226 Difference]: Without dead ends: 4662 [2019-10-13 20:05:28,593 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:05:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2019-10-13 20:05:28,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 4579. [2019-10-13 20:05:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4579 states. [2019-10-13 20:05:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 6749 transitions. [2019-10-13 20:05:28,804 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 6749 transitions. Word has length 204 [2019-10-13 20:05:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:28,805 INFO L462 AbstractCegarLoop]: Abstraction has 4579 states and 6749 transitions. [2019-10-13 20:05:28,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:05:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 6749 transitions. [2019-10-13 20:05:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-13 20:05:28,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:28,814 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:05:29,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:29,019 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:29,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1031566485, now seen corresponding path program 1 times [2019-10-13 20:05:29,021 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:29,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778339034] [2019-10-13 20:05:29,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:29,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:29,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:29,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778339034] [2019-10-13 20:05:29,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708826966] [2019-10-13 20:05:29,305 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 20:05:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:29,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 20:05:29,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 20:05:29,463 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 20:05:29,529 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:05:29,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-13 20:05:29,529 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144906039] [2019-10-13 20:05:29,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:05:29,532 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:29,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:05:29,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:05:29,532 INFO L87 Difference]: Start difference. First operand 4579 states and 6749 transitions. Second operand 3 states. [2019-10-13 20:05:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:30,554 INFO L93 Difference]: Finished difference Result 10692 states and 16111 transitions. [2019-10-13 20:05:30,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:05:30,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2019-10-13 20:05:30,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:30,591 INFO L225 Difference]: With dead ends: 10692 [2019-10-13 20:05:30,591 INFO L226 Difference]: Without dead ends: 6307 [2019-10-13 20:05:30,608 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:05:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2019-10-13 20:05:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 6300. [2019-10-13 20:05:30,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6300 states. [2019-10-13 20:05:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 9168 transitions. [2019-10-13 20:05:30,801 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 9168 transitions. Word has length 218 [2019-10-13 20:05:30,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:30,801 INFO L462 AbstractCegarLoop]: Abstraction has 6300 states and 9168 transitions. [2019-10-13 20:05:30,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:05:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 9168 transitions. [2019-10-13 20:05:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-10-13 20:05:30,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:30,810 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:05:31,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:31,023 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:31,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1069896338, now seen corresponding path program 1 times [2019-10-13 20:05:31,024 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:31,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624048787] [2019-10-13 20:05:31,024 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:31,025 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:31,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 106 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:31,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624048787] [2019-10-13 20:05:31,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841290528] [2019-10-13 20:05:31,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:31,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:05:31,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:31,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 20:05:31,827 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:32,003 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2019-10-13 20:05:32,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:32,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:32,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:32,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:32,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:32,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:32,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:32,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 72 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:05:32,292 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:05:32,292 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 5] total 20 [2019-10-13 20:05:32,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171667569] [2019-10-13 20:05:32,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:05:32,293 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:32,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:05:32,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-10-13 20:05:32,294 INFO L87 Difference]: Start difference. First operand 6300 states and 9168 transitions. Second operand 5 states. [2019-10-13 20:05:33,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:33,863 INFO L93 Difference]: Finished difference Result 12461 states and 18339 transitions. [2019-10-13 20:05:33,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:05:33,863 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2019-10-13 20:05:33,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:33,895 INFO L225 Difference]: With dead ends: 12461 [2019-10-13 20:05:33,895 INFO L226 Difference]: Without dead ends: 6355 [2019-10-13 20:05:33,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 448 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2019-10-13 20:05:33,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6355 states. [2019-10-13 20:05:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6355 to 6340. [2019-10-13 20:05:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6340 states. [2019-10-13 20:05:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 9306 transitions. [2019-10-13 20:05:34,096 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 9306 transitions. Word has length 225 [2019-10-13 20:05:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:34,097 INFO L462 AbstractCegarLoop]: Abstraction has 6340 states and 9306 transitions. [2019-10-13 20:05:34,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:05:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 9306 transitions. [2019-10-13 20:05:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-10-13 20:05:34,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:34,104 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:05:34,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:34,308 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1349983275, now seen corresponding path program 1 times [2019-10-13 20:05:34,309 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:34,309 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585984515] [2019-10-13 20:05:34,309 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:34,310 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:34,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-13 20:05:34,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585984515] [2019-10-13 20:05:34,470 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:34,470 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:34,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217343391] [2019-10-13 20:05:34,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:34,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:34,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:34,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:34,472 INFO L87 Difference]: Start difference. First operand 6340 states and 9306 transitions. Second operand 4 states. [2019-10-13 20:05:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:36,648 INFO L93 Difference]: Finished difference Result 16152 states and 24692 transitions. [2019-10-13 20:05:36,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:36,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2019-10-13 20:05:36,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:36,695 INFO L225 Difference]: With dead ends: 16152 [2019-10-13 20:05:36,696 INFO L226 Difference]: Without dead ends: 10006 [2019-10-13 20:05:36,720 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 20:05:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10006 states. [2019-10-13 20:05:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10006 to 9421. [2019-10-13 20:05:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9421 states. [2019-10-13 20:05:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9421 states to 9421 states and 13722 transitions. [2019-10-13 20:05:36,968 INFO L78 Accepts]: Start accepts. Automaton has 9421 states and 13722 transitions. Word has length 260 [2019-10-13 20:05:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:36,969 INFO L462 AbstractCegarLoop]: Abstraction has 9421 states and 13722 transitions. [2019-10-13 20:05:36,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 9421 states and 13722 transitions. [2019-10-13 20:05:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-10-13 20:05:36,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:36,980 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:05:36,980 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash -706378899, now seen corresponding path program 1 times [2019-10-13 20:05:36,981 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:36,982 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754110436] [2019-10-13 20:05:36,982 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:36,982 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:36,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 5 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-13 20:05:37,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754110436] [2019-10-13 20:05:37,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121945245] [2019-10-13 20:05:37,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:37,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:05:37,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:37,548 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:37,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1671559289] [2019-10-13 20:05:37,698 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 270 [2019-10-13 20:05:37,753 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:05:37,753 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)