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 0.1.24-13a467a-m [2019-10-15 00:09:50,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:50,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:50,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:50,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:50,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:50,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:50,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:50,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:50,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:50,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:50,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:50,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:50,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:50,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:50,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:50,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:50,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:50,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:50,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:50,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:50,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:50,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:50,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:50,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:09:50,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:50,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:50,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:50,054 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 00:09:50,070 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:50,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:50,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:50,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:50,074 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:50,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:50,074 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:50,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:50,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:50,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:50,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:50,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:50,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:50,076 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:50,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:50,076 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:50,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:50,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:50,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:50,077 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:50,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:50,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:50,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:50,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:50,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:50,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:50,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:50,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:50,080 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 00:09:50,385 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:50,398 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:50,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:50,403 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:50,403 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:50,404 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label17.c [2019-10-15 00:09:50,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a4eb38df/1e625b9345134f4aa658dae7ab8f9c89/FLAG909a9e8d8 [2019-10-15 00:09:51,255 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:51,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label17.c [2019-10-15 00:09:51,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a4eb38df/1e625b9345134f4aa658dae7ab8f9c89/FLAG909a9e8d8 [2019-10-15 00:09:51,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a4eb38df/1e625b9345134f4aa658dae7ab8f9c89 [2019-10-15 00:09:51,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:51,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:51,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:51,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:51,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:51,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:51" (1/1) ... [2019-10-15 00:09:51,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ed5976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:51, skipping insertion in model container [2019-10-15 00:09:51,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:51" (1/1) ... [2019-10-15 00:09:51,440 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:09:51,571 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:09:52,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:52,852 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:09:53,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:53,331 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:09:53,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:53 WrapperNode [2019-10-15 00:09:53,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:53,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:09:53,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:09:53,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:09:53,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:53" (1/1) ... [2019-10-15 00:09:53,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:53" (1/1) ... [2019-10-15 00:09:53,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:53" (1/1) ... [2019-10-15 00:09:53,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:53" (1/1) ... [2019-10-15 00:09:53,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:53" (1/1) ... [2019-10-15 00:09:53,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:53" (1/1) ... [2019-10-15 00:09:53,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:53" (1/1) ... [2019-10-15 00:09:53,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:09:53,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:09:53,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:09:53,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:09:53,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:53" (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 00:09:53,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:09:53,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:09:53,654 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:09:53,655 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:09:53,655 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:09:53,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:09:53,655 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:09:53,655 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:09:53,656 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:09:53,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:09:53,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:09:53,656 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:09:53,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:09:53,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:09:53,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:09:57,452 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:09:57,453 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:09:57,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:57 BoogieIcfgContainer [2019-10-15 00:09:57,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:09:57,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:09:57,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:09:57,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:09:57,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:51" (1/3) ... [2019-10-15 00:09:57,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf79a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:57, skipping insertion in model container [2019-10-15 00:09:57,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:53" (2/3) ... [2019-10-15 00:09:57,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf79a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:57, skipping insertion in model container [2019-10-15 00:09:57,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:57" (3/3) ... [2019-10-15 00:09:57,464 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label17.c [2019-10-15 00:09:57,475 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:09:57,489 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:09:57,503 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:09:57,552 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:09:57,552 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:09:57,553 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:09:57,553 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:09:57,553 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:09:57,553 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:09:57,553 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:09:57,553 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:09:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:09:57,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 00:09:57,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:57,610 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] [2019-10-15 00:09:57,612 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:57,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1487272786, now seen corresponding path program 1 times [2019-10-15 00:09:57,630 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:57,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159746878] [2019-10-15 00:09:57,631 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:57,631 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:57,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:58,014 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 00:09:58,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159746878] [2019-10-15 00:09:58,016 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:58,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:09:58,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960357876] [2019-10-15 00:09:58,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:09:58,023 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:58,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:09:58,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:09:58,041 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-10-15 00:10:05,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:05,335 INFO L93 Difference]: Finished difference Result 2970 states and 5743 transitions. [2019-10-15 00:10:05,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:05,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2019-10-15 00:10:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:05,368 INFO L225 Difference]: With dead ends: 2970 [2019-10-15 00:10:05,369 INFO L226 Difference]: Without dead ends: 2114 [2019-10-15 00:10:05,378 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 00:10:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-10-15 00:10:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2114. [2019-10-15 00:10:05,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2019-10-15 00:10:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3476 transitions. [2019-10-15 00:10:05,562 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3476 transitions. Word has length 37 [2019-10-15 00:10:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:05,563 INFO L462 AbstractCegarLoop]: Abstraction has 2114 states and 3476 transitions. [2019-10-15 00:10:05,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3476 transitions. [2019-10-15 00:10:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-15 00:10:05,576 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:05,576 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] [2019-10-15 00:10:05,577 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:05,578 INFO L82 PathProgramCache]: Analyzing trace with hash -270817417, now seen corresponding path program 1 times [2019-10-15 00:10:05,579 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:05,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823335990] [2019-10-15 00:10:05,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:05,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:05,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:05,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823335990] [2019-10-15 00:10:05,933 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:05,933 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:10:05,933 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197120696] [2019-10-15 00:10:05,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:05,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:05,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:05,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:10:05,943 INFO L87 Difference]: Start difference. First operand 2114 states and 3476 transitions. Second operand 5 states. [2019-10-15 00:10:11,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:11,698 INFO L93 Difference]: Finished difference Result 6436 states and 10709 transitions. [2019-10-15 00:10:11,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:11,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2019-10-15 00:10:11,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:11,723 INFO L225 Difference]: With dead ends: 6436 [2019-10-15 00:10:11,723 INFO L226 Difference]: Without dead ends: 4328 [2019-10-15 00:10:11,728 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 00:10:11,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2019-10-15 00:10:11,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4296. [2019-10-15 00:10:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4296 states. [2019-10-15 00:10:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6660 transitions. [2019-10-15 00:10:11,833 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6660 transitions. Word has length 106 [2019-10-15 00:10:11,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:11,834 INFO L462 AbstractCegarLoop]: Abstraction has 4296 states and 6660 transitions. [2019-10-15 00:10:11,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6660 transitions. [2019-10-15 00:10:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 00:10:11,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:11,838 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] [2019-10-15 00:10:11,838 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:11,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1363746410, now seen corresponding path program 1 times [2019-10-15 00:10:11,839 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:11,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039720056] [2019-10-15 00:10:11,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:11,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:11,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:11,991 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039720056] [2019-10-15 00:10:11,991 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:11,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:11,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786872449] [2019-10-15 00:10:11,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:11,993 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:11,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:11,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:11,994 INFO L87 Difference]: Start difference. First operand 4296 states and 6660 transitions. Second operand 6 states. [2019-10-15 00:10:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:17,700 INFO L93 Difference]: Finished difference Result 10829 states and 16791 transitions. [2019-10-15 00:10:17,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:17,702 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2019-10-15 00:10:17,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:17,745 INFO L225 Difference]: With dead ends: 10829 [2019-10-15 00:10:17,746 INFO L226 Difference]: Without dead ends: 6539 [2019-10-15 00:10:17,759 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 00:10:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2019-10-15 00:10:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6505. [2019-10-15 00:10:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6505 states. [2019-10-15 00:10:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 8565 transitions. [2019-10-15 00:10:17,966 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 8565 transitions. Word has length 133 [2019-10-15 00:10:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:17,969 INFO L462 AbstractCegarLoop]: Abstraction has 6505 states and 8565 transitions. [2019-10-15 00:10:17,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:17,969 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 8565 transitions. [2019-10-15 00:10:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-10-15 00:10:17,981 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:17,982 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] [2019-10-15 00:10:17,982 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:17,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:17,982 INFO L82 PathProgramCache]: Analyzing trace with hash -115419733, now seen corresponding path program 1 times [2019-10-15 00:10:17,983 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:17,983 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391900104] [2019-10-15 00:10:17,983 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:17,983 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:17,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 00:10:18,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391900104] [2019-10-15 00:10:18,165 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:18,165 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:10:18,165 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719252005] [2019-10-15 00:10:18,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:18,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:18,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:10:18,167 INFO L87 Difference]: Start difference. First operand 6505 states and 8565 transitions. Second operand 4 states. [2019-10-15 00:10:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:24,950 INFO L93 Difference]: Finished difference Result 25853 states and 35127 transitions. [2019-10-15 00:10:24,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:24,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 212 [2019-10-15 00:10:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:25,031 INFO L225 Difference]: With dead ends: 25853 [2019-10-15 00:10:25,032 INFO L226 Difference]: Without dead ends: 19354 [2019-10-15 00:10:25,050 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 00:10:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19354 states. [2019-10-15 00:10:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19354 to 18652. [2019-10-15 00:10:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18652 states. [2019-10-15 00:10:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18652 states to 18652 states and 24319 transitions. [2019-10-15 00:10:25,504 INFO L78 Accepts]: Start accepts. Automaton has 18652 states and 24319 transitions. Word has length 212 [2019-10-15 00:10:25,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:25,507 INFO L462 AbstractCegarLoop]: Abstraction has 18652 states and 24319 transitions. [2019-10-15 00:10:25,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:25,507 INFO L276 IsEmpty]: Start isEmpty. Operand 18652 states and 24319 transitions. [2019-10-15 00:10:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-10-15 00:10:25,514 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:25,514 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] [2019-10-15 00:10:25,514 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:25,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:25,515 INFO L82 PathProgramCache]: Analyzing trace with hash -461049505, now seen corresponding path program 1 times [2019-10-15 00:10:25,515 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:25,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059291097] [2019-10-15 00:10:25,517 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:25,517 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:25,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:25,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059291097] [2019-10-15 00:10:25,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308535453] [2019-10-15 00:10:25,914 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 00:10:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:26,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:10:26,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:26,229 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:26,452 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1858385373] [2019-10-15 00:10:26,460 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 255 [2019-10-15 00:10:26,517 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:10:26,517 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)