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/Problem18_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:10:11,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:10:11,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:10:11,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:10:11,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:10:11,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:10:11,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:10:11,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:10:11,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:10:11,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:10:11,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:10:11,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:10:11,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:10:11,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:10:11,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:10:11,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:10:11,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:10:11,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:10:11,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:10:11,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:10:11,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:10:11,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:10:11,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:10:11,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:10:11,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:10:11,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:10:11,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:10:11,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:10:11,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:10:11,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:10:11,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:10:11,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:10:11,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:10:11,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:10:11,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:10:11,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:10:11,170 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 [2019-10-15 00:10:11,185 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:10:11,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:10:11,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:10:11,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:10:11,187 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:10:11,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:10:11,187 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:10:11,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:10:11,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:10:11,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:10:11,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:10:11,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:10:11,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:10:11,189 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:10:11,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:10:11,189 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:10:11,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:10:11,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:10:11,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:10:11,190 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:10:11,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:10:11,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:11,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:10:11,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:10:11,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:10:11,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:10:11,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:10:11,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:10:11,194 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 [2019-10-15 00:10:11,543 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:10:11,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:10:11,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:10:11,562 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:10:11,563 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:10:11,564 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label28.c [2019-10-15 00:10:11,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f0514ea9/c2940398a83744ad9ab965d2454cba37/FLAG1ee5be408 [2019-10-15 00:10:12,315 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:10:12,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label28.c [2019-10-15 00:10:12,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f0514ea9/c2940398a83744ad9ab965d2454cba37/FLAG1ee5be408 [2019-10-15 00:10:12,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f0514ea9/c2940398a83744ad9ab965d2454cba37 [2019-10-15 00:10:12,452 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:10:12,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:10:12,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:12,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:10:12,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:10:12,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:12" (1/1) ... [2019-10-15 00:10:12,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:12, skipping insertion in model container [2019-10-15 00:10:12,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:12" (1/1) ... [2019-10-15 00:10:12,472 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:10:12,589 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:10:14,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:14,019 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:10:14,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:14,509 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:10:14,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:14 WrapperNode [2019-10-15 00:10:14,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:14,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:10:14,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:10:14,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:10:14,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:14" (1/1) ... [2019-10-15 00:10:14,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:14" (1/1) ... [2019-10-15 00:10:14,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:14" (1/1) ... [2019-10-15 00:10:14,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:14" (1/1) ... [2019-10-15 00:10:14,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:14" (1/1) ... [2019-10-15 00:10:14,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:14" (1/1) ... [2019-10-15 00:10:14,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:14" (1/1) ... [2019-10-15 00:10:14,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:10:14,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:10:14,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:10:14,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:10:14,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:14" (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 [2019-10-15 00:10:14,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:10:14,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:10:14,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:10:14,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:10:14,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:10:14,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:10:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:10:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:10:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:10:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:10:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:10:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:10:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:10:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:10:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:18,479 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:18,480 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:18,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:18 BoogieIcfgContainer [2019-10-15 00:10:18,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:18,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:18,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:18,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:18,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:10:12" (1/3) ... [2019-10-15 00:10:18,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69589446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:18, skipping insertion in model container [2019-10-15 00:10:18,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:14" (2/3) ... [2019-10-15 00:10:18,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69589446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:18, skipping insertion in model container [2019-10-15 00:10:18,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:18" (3/3) ... [2019-10-15 00:10:18,501 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label28.c [2019-10-15 00:10:18,513 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:18,523 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:18,535 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:18,582 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:18,582 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:18,582 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:18,582 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:18,582 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:18,582 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:18,583 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:18,583 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:18,631 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-15 00:10:18,639 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:18,640 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:18,641 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:18,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:18,646 INFO L82 PathProgramCache]: Analyzing trace with hash -614102951, now seen corresponding path program 1 times [2019-10-15 00:10:18,653 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:18,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683720249] [2019-10-15 00:10:18,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:18,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:18,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:19,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683720249] [2019-10-15 00:10:19,007 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:19,007 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:10:19,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956731217] [2019-10-15 00:10:19,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:19,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:19,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:19,035 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-10-15 00:10:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:26,243 INFO L93 Difference]: Finished difference Result 2970 states and 5743 transitions. [2019-10-15 00:10:26,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:26,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-10-15 00:10:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:26,297 INFO L225 Difference]: With dead ends: 2970 [2019-10-15 00:10:26,298 INFO L226 Difference]: Without dead ends: 2114 [2019-10-15 00:10:26,312 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 [2019-10-15 00:10:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-10-15 00:10:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1412. [2019-10-15 00:10:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:10:26,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2246 transitions. [2019-10-15 00:10:26,471 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2246 transitions. Word has length 70 [2019-10-15 00:10:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:26,473 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2246 transitions. [2019-10-15 00:10:26,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2246 transitions. [2019-10-15 00:10:26,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-15 00:10:26,489 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:26,489 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:26,490 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:26,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:26,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1169931765, now seen corresponding path program 1 times [2019-10-15 00:10:26,491 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:26,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009140439] [2019-10-15 00:10:26,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:26,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:26,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:26,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009140439] [2019-10-15 00:10:26,755 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:26,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:10:26,756 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149345826] [2019-10-15 00:10:26,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:26,761 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:26,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:26,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:10:26,762 INFO L87 Difference]: Start difference. First operand 1412 states and 2246 transitions. Second operand 5 states. [2019-10-15 00:10:32,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:32,669 INFO L93 Difference]: Finished difference Result 4294 states and 6875 transitions. [2019-10-15 00:10:32,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:32,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2019-10-15 00:10:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:32,687 INFO L225 Difference]: With dead ends: 4294 [2019-10-15 00:10:32,687 INFO L226 Difference]: Without dead ends: 2888 [2019-10-15 00:10:32,691 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:10:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-15 00:10:32,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2866. [2019-10-15 00:10:32,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2866 states. [2019-10-15 00:10:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 4300 transitions. [2019-10-15 00:10:32,787 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 4300 transitions. Word has length 139 [2019-10-15 00:10:32,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:32,788 INFO L462 AbstractCegarLoop]: Abstraction has 2866 states and 4300 transitions. [2019-10-15 00:10:32,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:32,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 4300 transitions. [2019-10-15 00:10:32,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-15 00:10:32,790 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:32,790 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:32,791 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:32,791 INFO L82 PathProgramCache]: Analyzing trace with hash 387948717, now seen corresponding path program 1 times [2019-10-15 00:10:32,791 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:32,792 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071130025] [2019-10-15 00:10:32,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:32,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:32,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:32,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071130025] [2019-10-15 00:10:32,907 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:32,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:32,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974353538] [2019-10-15 00:10:32,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:32,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:32,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:32,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:32,909 INFO L87 Difference]: Start difference. First operand 2866 states and 4300 transitions. Second operand 6 states. [2019-10-15 00:10:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:37,601 INFO L93 Difference]: Finished difference Result 7223 states and 10803 transitions. [2019-10-15 00:10:37,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:37,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-10-15 00:10:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:37,631 INFO L225 Difference]: With dead ends: 7223 [2019-10-15 00:10:37,631 INFO L226 Difference]: Without dead ends: 4363 [2019-10-15 00:10:37,639 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 [2019-10-15 00:10:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2019-10-15 00:10:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 4334. [2019-10-15 00:10:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4334 states. [2019-10-15 00:10:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4334 states to 4334 states and 5546 transitions. [2019-10-15 00:10:37,809 INFO L78 Accepts]: Start accepts. Automaton has 4334 states and 5546 transitions. Word has length 143 [2019-10-15 00:10:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:37,810 INFO L462 AbstractCegarLoop]: Abstraction has 4334 states and 5546 transitions. [2019-10-15 00:10:37,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4334 states and 5546 transitions. [2019-10-15 00:10:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-15 00:10:37,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:37,815 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:37,816 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:37,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:37,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1153005556, now seen corresponding path program 1 times [2019-10-15 00:10:37,817 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:37,817 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609284308] [2019-10-15 00:10:37,817 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:37,817 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:37,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:38,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609284308] [2019-10-15 00:10:38,124 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:38,125 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:10:38,125 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598609108] [2019-10-15 00:10:38,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:38,126 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:38,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:38,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:38,127 INFO L87 Difference]: Start difference. First operand 4334 states and 5546 transitions. Second operand 4 states. [2019-10-15 00:10:44,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:44,194 INFO L93 Difference]: Finished difference Result 17212 states and 22491 transitions. [2019-10-15 00:10:44,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:44,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 176 [2019-10-15 00:10:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:44,257 INFO L225 Difference]: With dead ends: 17212 [2019-10-15 00:10:44,257 INFO L226 Difference]: Without dead ends: 12884 [2019-10-15 00:10:44,270 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 [2019-10-15 00:10:44,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12884 states. [2019-10-15 00:10:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12884 to 12884. [2019-10-15 00:10:44,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12884 states. [2019-10-15 00:10:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12884 states to 12884 states and 15889 transitions. [2019-10-15 00:10:44,609 INFO L78 Accepts]: Start accepts. Automaton has 12884 states and 15889 transitions. Word has length 176 [2019-10-15 00:10:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:44,611 INFO L462 AbstractCegarLoop]: Abstraction has 12884 states and 15889 transitions. [2019-10-15 00:10:44,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:44,611 INFO L276 IsEmpty]: Start isEmpty. Operand 12884 states and 15889 transitions. [2019-10-15 00:10:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-10-15 00:10:44,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:44,617 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:44,618 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:44,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:44,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1116911945, now seen corresponding path program 1 times [2019-10-15 00:10:44,618 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:44,619 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315308511] [2019-10-15 00:10:44,619 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:44,620 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:44,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:45,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315308511] [2019-10-15 00:10:45,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013185369] [2019-10-15 00:10:45,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:10:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:45,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:10:45,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:45,352 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:45,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [992602187] [2019-10-15 00:10:45,539 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 287 [2019-10-15 00:10:45,599 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:10:45,601 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)