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_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:10:54,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:10:54,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:10:54,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:10:54,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:10:54,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:10:54,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:10:54,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:10:54,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:10:54,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:10:54,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:10:54,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:10:54,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:10:54,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:10:54,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:10:54,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:10:54,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:10:54,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:10:54,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:10:54,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:10:54,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:10:54,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:10:54,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:10:54,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:10:54,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:10:54,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:10:54,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:10:54,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:10:54,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:10:54,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:10:54,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:10:54,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:10:54,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:10:54,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:10:54,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:10:54,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:10:54,160 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 20:10:54,181 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:10:54,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:10:54,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:10:54,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:10:54,183 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:10:54,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:10:54,184 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:10:54,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:10:54,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:10:54,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:10:54,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:10:54,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:10:54,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:10:54,185 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:10:54,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:10:54,185 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:10:54,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:10:54,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:10:54,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:10:54,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:10:54,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:10:54,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:10:54,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:10:54,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:10:54,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:10:54,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:10:54,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:10:54,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:10:54,188 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 20:10:54,471 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:10:54,487 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:10:54,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:10:54,496 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:10:54,496 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:10:54,497 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label17.c [2019-10-13 20:10:54,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c73567845/41dc0f3d454a4ab48a7a80c2f634edea/FLAG6c1489ebb [2019-10-13 20:10:55,331 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:10:55,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label17.c [2019-10-13 20:10:55,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c73567845/41dc0f3d454a4ab48a7a80c2f634edea/FLAG6c1489ebb [2019-10-13 20:10:55,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c73567845/41dc0f3d454a4ab48a7a80c2f634edea [2019-10-13 20:10:55,437 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:10:55,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:10:55,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:55,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:10:55,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:10:55,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:55" (1/1) ... [2019-10-13 20:10:55,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6688ee2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:55, skipping insertion in model container [2019-10-13 20:10:55,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:55" (1/1) ... [2019-10-13 20:10:55,459 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:10:55,591 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:10:57,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:57,228 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:10:57,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:57,709 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:10:57,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:57 WrapperNode [2019-10-13 20:10:57,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:57,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:10:57,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:10:57,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:10:57,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:57" (1/1) ... [2019-10-13 20:10:57,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:57" (1/1) ... [2019-10-13 20:10:57,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:57" (1/1) ... [2019-10-13 20:10:57,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:57" (1/1) ... [2019-10-13 20:10:57,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:57" (1/1) ... [2019-10-13 20:10:57,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:57" (1/1) ... [2019-10-13 20:10:57,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:57" (1/1) ... [2019-10-13 20:10:58,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:10:58,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:10:58,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:10:58,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:10:58,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:57" (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 20:10:58,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:10:58,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:10:58,080 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:10:58,081 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:10:58,081 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:10:58,081 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:10:58,081 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:10:58,082 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:10:58,083 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:10:58,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:10:58,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:10:58,084 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:10:58,084 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:10:58,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:10:58,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:11:01,970 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:11:01,970 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:11:01,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:01 BoogieIcfgContainer [2019-10-13 20:11:01,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:11:01,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:11:01,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:11:01,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:11:01,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:10:55" (1/3) ... [2019-10-13 20:11:01,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6627d902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:01, skipping insertion in model container [2019-10-13 20:11:01,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:57" (2/3) ... [2019-10-13 20:11:01,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6627d902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:01, skipping insertion in model container [2019-10-13 20:11:01,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:01" (3/3) ... [2019-10-13 20:11:01,991 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label17.c [2019-10-13 20:11:02,006 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:11:02,020 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:11:02,032 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:11:02,076 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:11:02,077 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:11:02,077 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:11:02,077 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:11:02,077 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:11:02,077 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:11:02,077 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:11:02,078 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:11:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:11:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-13 20:11:02,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:02,126 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] [2019-10-13 20:11:02,128 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:02,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1487272786, now seen corresponding path program 1 times [2019-10-13 20:11:02,142 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:02,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597301729] [2019-10-13 20:11:02,143 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:02,143 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:02,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:02,528 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 20:11:02,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597301729] [2019-10-13 20:11:02,529 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:02,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:11:02,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609075055] [2019-10-13 20:11:02,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:11:02,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:02,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:11:02,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:11:02,554 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-10-13 20:11:10,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:10,299 INFO L93 Difference]: Finished difference Result 2970 states and 5743 transitions. [2019-10-13 20:11:10,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:11:10,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2019-10-13 20:11:10,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:10,344 INFO L225 Difference]: With dead ends: 2970 [2019-10-13 20:11:10,344 INFO L226 Difference]: Without dead ends: 2114 [2019-10-13 20:11:10,358 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 20:11:10,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-10-13 20:11:10,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2114. [2019-10-13 20:11:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2019-10-13 20:11:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3476 transitions. [2019-10-13 20:11:10,550 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3476 transitions. Word has length 37 [2019-10-13 20:11:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:10,551 INFO L462 AbstractCegarLoop]: Abstraction has 2114 states and 3476 transitions. [2019-10-13 20:11:10,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:11:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3476 transitions. [2019-10-13 20:11:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 20:11:10,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:10,557 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:10,558 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:10,558 INFO L82 PathProgramCache]: Analyzing trace with hash -270817417, now seen corresponding path program 1 times [2019-10-13 20:11:10,559 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:10,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859421232] [2019-10-13 20:11:10,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:10,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:10,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:10,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859421232] [2019-10-13 20:11:10,740 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:10,741 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:11:10,741 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815512892] [2019-10-13 20:11:10,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:11:10,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:10,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:11:10,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:11:10,749 INFO L87 Difference]: Start difference. First operand 2114 states and 3476 transitions. Second operand 5 states. [2019-10-13 20:11:16,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:16,593 INFO L93 Difference]: Finished difference Result 6436 states and 10709 transitions. [2019-10-13 20:11:16,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:16,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2019-10-13 20:11:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:16,626 INFO L225 Difference]: With dead ends: 6436 [2019-10-13 20:11:16,626 INFO L226 Difference]: Without dead ends: 4328 [2019-10-13 20:11:16,633 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 [2019-10-13 20:11:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2019-10-13 20:11:16,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4296. [2019-10-13 20:11:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4296 states. [2019-10-13 20:11:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6660 transitions. [2019-10-13 20:11:16,759 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6660 transitions. Word has length 106 [2019-10-13 20:11:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:16,759 INFO L462 AbstractCegarLoop]: Abstraction has 4296 states and 6660 transitions. [2019-10-13 20:11:16,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:11:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6660 transitions. [2019-10-13 20:11:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 20:11:16,771 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:16,772 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:16,772 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:16,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1363746410, now seen corresponding path program 1 times [2019-10-13 20:11:16,774 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:16,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174903365] [2019-10-13 20:11:16,774 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:16,774 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:16,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:16,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174903365] [2019-10-13 20:11:16,959 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:16,960 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:16,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670494287] [2019-10-13 20:11:16,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:16,961 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:16,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:16,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:16,962 INFO L87 Difference]: Start difference. First operand 4296 states and 6660 transitions. Second operand 6 states. [2019-10-13 20:11:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:22,603 INFO L93 Difference]: Finished difference Result 10829 states and 16791 transitions. [2019-10-13 20:11:22,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:22,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2019-10-13 20:11:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:22,637 INFO L225 Difference]: With dead ends: 10829 [2019-10-13 20:11:22,637 INFO L226 Difference]: Without dead ends: 6539 [2019-10-13 20:11:22,648 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:11:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2019-10-13 20:11:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6505. [2019-10-13 20:11:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6505 states. [2019-10-13 20:11:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 8565 transitions. [2019-10-13 20:11:22,851 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 8565 transitions. Word has length 133 [2019-10-13 20:11:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:22,854 INFO L462 AbstractCegarLoop]: Abstraction has 6505 states and 8565 transitions. [2019-10-13 20:11:22,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 8565 transitions. [2019-10-13 20:11:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-10-13 20:11:22,858 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:22,859 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:11:22,859 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:22,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:22,860 INFO L82 PathProgramCache]: Analyzing trace with hash -115419733, now seen corresponding path program 1 times [2019-10-13 20:11:22,860 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:22,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293141630] [2019-10-13 20:11:22,860 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:22,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:22,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 20:11:23,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293141630] [2019-10-13 20:11:23,073 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:23,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:11:23,074 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500898309] [2019-10-13 20:11:23,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:11:23,075 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:23,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:11:23,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:11:23,075 INFO L87 Difference]: Start difference. First operand 6505 states and 8565 transitions. Second operand 4 states. [2019-10-13 20:11:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:29,444 INFO L93 Difference]: Finished difference Result 25853 states and 35127 transitions. [2019-10-13 20:11:29,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:11:29,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 212 [2019-10-13 20:11:29,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:29,533 INFO L225 Difference]: With dead ends: 25853 [2019-10-13 20:11:29,533 INFO L226 Difference]: Without dead ends: 19354 [2019-10-13 20:11:29,550 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 20:11:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19354 states. [2019-10-13 20:11:29,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19354 to 18652. [2019-10-13 20:11:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18652 states. [2019-10-13 20:11:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18652 states to 18652 states and 24319 transitions. [2019-10-13 20:11:30,020 INFO L78 Accepts]: Start accepts. Automaton has 18652 states and 24319 transitions. Word has length 212 [2019-10-13 20:11:30,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:30,022 INFO L462 AbstractCegarLoop]: Abstraction has 18652 states and 24319 transitions. [2019-10-13 20:11:30,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:11:30,022 INFO L276 IsEmpty]: Start isEmpty. Operand 18652 states and 24319 transitions. [2019-10-13 20:11:30,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-10-13 20:11:30,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:30,028 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:11:30,029 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:30,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:30,029 INFO L82 PathProgramCache]: Analyzing trace with hash -461049505, now seen corresponding path program 1 times [2019-10-13 20:11:30,029 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:30,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861908452] [2019-10-13 20:11:30,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:30,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:30,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:30,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861908452] [2019-10-13 20:11:30,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772369785] [2019-10-13 20:11:30,412 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 20:11:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:30,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:11:30,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:30,710 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:11:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:30,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1565308631] [2019-10-13 20:11:30,935 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 255