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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:00:05,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:00:05,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:00:05,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:00:05,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:00:05,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:00:05,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:00:05,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:00:05,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:00:05,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:00:05,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:00:05,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:00:05,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:00:05,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:00:05,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:00:05,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:00:05,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:00:05,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:00:05,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:00:05,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:00:05,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:00:05,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:00:05,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:00:05,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:00:05,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:00:05,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:00:05,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:00:05,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:00:05,661 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 18:00:05,682 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:00:05,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:00:05,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:00:05,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:00:05,686 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:00:05,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:00:05,686 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:00:05,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:00:05,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:00:05,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:00:05,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:00:05,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:00:05,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:00:05,689 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:00:05,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:00:05,689 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:00:05,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:00:05,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:00:05,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:00:05,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:00:05,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:00:05,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:05,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:00:05,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:00:05,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:00:05,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:00:05,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:00:05,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:00:05,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:00:05,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:00:06,000 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:00:06,004 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:00:06,005 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:00:06,006 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:00:06,007 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label27.c [2019-10-13 18:00:06,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b45b51481/3b29563a619646f29f68f66765b453d2/FLAGc7d222b55 [2019-10-13 18:00:06,718 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:00:06,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label27.c [2019-10-13 18:00:06,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b45b51481/3b29563a619646f29f68f66765b453d2/FLAGc7d222b55 [2019-10-13 18:00:06,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b45b51481/3b29563a619646f29f68f66765b453d2 [2019-10-13 18:00:06,946 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:00:06,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:00:06,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:06,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:00:06,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:00:06,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:06" (1/1) ... [2019-10-13 18:00:06,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258cf6f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:06, skipping insertion in model container [2019-10-13 18:00:06,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:06" (1/1) ... [2019-10-13 18:00:06,965 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:00:07,029 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:00:07,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:07,773 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:00:08,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:08,036 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:00:08,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08 WrapperNode [2019-10-13 18:00:08,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:08,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:00:08,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:00:08,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:00:08,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:08,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:08,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:08,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:08,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:08,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:08,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (1/1) ... [2019-10-13 18:00:08,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:00:08,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:00:08,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:00:08,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:00:08,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (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 18:00:08,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:00:08,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:00:08,371 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:00:08,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:00:08,371 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:00:08,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:00:08,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:00:08,372 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:00:08,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:00:08,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:00:08,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:00:10,260 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:00:10,260 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:00:10,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:10 BoogieIcfgContainer [2019-10-13 18:00:10,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:00:10,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:00:10,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:00:10,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:00:10,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:06" (1/3) ... [2019-10-13 18:00:10,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4591dd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:10, skipping insertion in model container [2019-10-13 18:00:10,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:08" (2/3) ... [2019-10-13 18:00:10,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4591dd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:10, skipping insertion in model container [2019-10-13 18:00:10,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:10" (3/3) ... [2019-10-13 18:00:10,286 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label27.c [2019-10-13 18:00:10,300 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:00:10,312 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:00:10,326 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:00:10,368 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:00:10,368 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:00:10,370 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:00:10,370 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:00:10,370 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:00:10,370 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:00:10,370 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:00:10,370 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:00:10,407 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 18:00:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 18:00:10,418 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:10,420 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] [2019-10-13 18:00:10,422 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:10,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:10,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1647483275, now seen corresponding path program 1 times [2019-10-13 18:00:10,438 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:10,439 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298658139] [2019-10-13 18:00:10,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:10,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:10,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:10,999 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 18:00:10,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298658139] [2019-10-13 18:00:11,000 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:11,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:00:11,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278089737] [2019-10-13 18:00:11,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:11,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:11,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:11,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:11,024 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 18:00:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:14,533 INFO L93 Difference]: Finished difference Result 1005 states and 1792 transitions. [2019-10-13 18:00:14,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:14,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2019-10-13 18:00:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:14,575 INFO L225 Difference]: With dead ends: 1005 [2019-10-13 18:00:14,575 INFO L226 Difference]: Without dead ends: 629 [2019-10-13 18:00:14,590 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-13 18:00:14,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 424. [2019-10-13 18:00:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2019-10-13 18:00:14,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 609 transitions. [2019-10-13 18:00:14,738 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 609 transitions. Word has length 48 [2019-10-13 18:00:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:14,739 INFO L462 AbstractCegarLoop]: Abstraction has 424 states and 609 transitions. [2019-10-13 18:00:14,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 609 transitions. [2019-10-13 18:00:14,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 18:00:14,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:14,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:14,757 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:14,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:14,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2032953802, now seen corresponding path program 1 times [2019-10-13 18:00:14,758 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:14,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229488805] [2019-10-13 18:00:14,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:14,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:14,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:15,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229488805] [2019-10-13 18:00:15,179 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:15,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:00:15,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156165158] [2019-10-13 18:00:15,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:00:15,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:15,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:00:15,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:00:15,187 INFO L87 Difference]: Start difference. First operand 424 states and 609 transitions. Second operand 9 states. [2019-10-13 18:00:18,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:18,303 INFO L93 Difference]: Finished difference Result 1645 states and 2450 transitions. [2019-10-13 18:00:18,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:00:18,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 120 [2019-10-13 18:00:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:18,319 INFO L225 Difference]: With dead ends: 1645 [2019-10-13 18:00:18,320 INFO L226 Difference]: Without dead ends: 1227 [2019-10-13 18:00:18,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:00:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2019-10-13 18:00:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1198. [2019-10-13 18:00:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1198 states. [2019-10-13 18:00:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1680 transitions. [2019-10-13 18:00:18,388 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1680 transitions. Word has length 120 [2019-10-13 18:00:18,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:18,390 INFO L462 AbstractCegarLoop]: Abstraction has 1198 states and 1680 transitions. [2019-10-13 18:00:18,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:00:18,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1680 transitions. [2019-10-13 18:00:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 18:00:18,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:18,396 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:18,397 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash 758583974, now seen corresponding path program 1 times [2019-10-13 18:00:18,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:18,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027296892] [2019-10-13 18:00:18,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:18,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:18,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:18,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027296892] [2019-10-13 18:00:18,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270801579] [2019-10-13 18:00:18,650 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 18:00:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:18,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:18,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:18,859 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:18,859 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:00:18,859 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360148097] [2019-10-13 18:00:18,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:18,862 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:18,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:18,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:18,870 INFO L87 Difference]: Start difference. First operand 1198 states and 1680 transitions. Second operand 3 states. [2019-10-13 18:00:19,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:19,997 INFO L93 Difference]: Finished difference Result 2782 states and 3940 transitions. [2019-10-13 18:00:19,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:19,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2019-10-13 18:00:19,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:20,007 INFO L225 Difference]: With dead ends: 2782 [2019-10-13 18:00:20,008 INFO L226 Difference]: Without dead ends: 1590 [2019-10-13 18:00:20,011 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:20,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2019-10-13 18:00:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1581. [2019-10-13 18:00:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1581 states. [2019-10-13 18:00:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2221 transitions. [2019-10-13 18:00:20,065 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2221 transitions. Word has length 122 [2019-10-13 18:00:20,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:20,068 INFO L462 AbstractCegarLoop]: Abstraction has 1581 states and 2221 transitions. [2019-10-13 18:00:20,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:20,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2221 transitions. [2019-10-13 18:00:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 18:00:20,076 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:20,077 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:20,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:20,281 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:20,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1062949639, now seen corresponding path program 1 times [2019-10-13 18:00:20,282 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:20,283 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137882674] [2019-10-13 18:00:20,283 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:20,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:20,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:20,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137882674] [2019-10-13 18:00:20,514 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:20,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 18:00:20,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51418631] [2019-10-13 18:00:20,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 18:00:20,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:20,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 18:00:20,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:20,517 INFO L87 Difference]: Start difference. First operand 1581 states and 2221 transitions. Second operand 7 states. [2019-10-13 18:00:23,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:23,069 INFO L93 Difference]: Finished difference Result 4769 states and 7030 transitions. [2019-10-13 18:00:23,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:00:23,069 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2019-10-13 18:00:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:23,090 INFO L225 Difference]: With dead ends: 4769 [2019-10-13 18:00:23,090 INFO L226 Difference]: Without dead ends: 3194 [2019-10-13 18:00:23,096 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:00:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2019-10-13 18:00:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 2582. [2019-10-13 18:00:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2582 states. [2019-10-13 18:00:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 3506 transitions. [2019-10-13 18:00:23,198 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 3506 transitions. Word has length 123 [2019-10-13 18:00:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:23,200 INFO L462 AbstractCegarLoop]: Abstraction has 2582 states and 3506 transitions. [2019-10-13 18:00:23,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 18:00:23,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 3506 transitions. [2019-10-13 18:00:23,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 18:00:23,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:23,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:23,207 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:23,207 INFO L82 PathProgramCache]: Analyzing trace with hash 669937364, now seen corresponding path program 1 times [2019-10-13 18:00:23,208 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:23,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807027423] [2019-10-13 18:00:23,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:23,209 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:23,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:23,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807027423] [2019-10-13 18:00:23,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470650117] [2019-10-13 18:00:23,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:23,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:23,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:23,698 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:23,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-13 18:00:23,699 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033056866] [2019-10-13 18:00:23,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:23,700 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:23,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:23,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:23,700 INFO L87 Difference]: Start difference. First operand 2582 states and 3506 transitions. Second operand 3 states. [2019-10-13 18:00:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:24,836 INFO L93 Difference]: Finished difference Result 6527 states and 9114 transitions. [2019-10-13 18:00:24,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:24,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 179 [2019-10-13 18:00:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:24,859 INFO L225 Difference]: With dead ends: 6527 [2019-10-13 18:00:24,859 INFO L226 Difference]: Without dead ends: 3951 [2019-10-13 18:00:24,866 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:24,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2019-10-13 18:00:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3946. [2019-10-13 18:00:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3946 states. [2019-10-13 18:00:24,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 5383 transitions. [2019-10-13 18:00:24,967 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 5383 transitions. Word has length 179 [2019-10-13 18:00:24,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:24,968 INFO L462 AbstractCegarLoop]: Abstraction has 3946 states and 5383 transitions. [2019-10-13 18:00:24,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 5383 transitions. [2019-10-13 18:00:24,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-13 18:00:24,973 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:24,973 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, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:25,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:25,181 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash -935815360, now seen corresponding path program 1 times [2019-10-13 18:00:25,184 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:25,184 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086069787] [2019-10-13 18:00:25,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:25,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:25,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:25,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086069787] [2019-10-13 18:00:25,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215903847] [2019-10-13 18:00:25,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:25,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:25,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 18:00:25,717 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:25,718 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 18:00:25,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357661379] [2019-10-13 18:00:25,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:25,719 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:25,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:25,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:00:25,719 INFO L87 Difference]: Start difference. First operand 3946 states and 5383 transitions. Second operand 3 states. [2019-10-13 18:00:26,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:26,876 INFO L93 Difference]: Finished difference Result 7895 states and 10813 transitions. [2019-10-13 18:00:26,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:26,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2019-10-13 18:00:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:26,897 INFO L225 Difference]: With dead ends: 7895 [2019-10-13 18:00:26,897 INFO L226 Difference]: Without dead ends: 3955 [2019-10-13 18:00:26,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:00:26,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2019-10-13 18:00:26,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3942. [2019-10-13 18:00:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3942 states. [2019-10-13 18:00:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 5187 transitions. [2019-10-13 18:00:27,003 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 5187 transitions. Word has length 191 [2019-10-13 18:00:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:27,004 INFO L462 AbstractCegarLoop]: Abstraction has 3942 states and 5187 transitions. [2019-10-13 18:00:27,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 5187 transitions. [2019-10-13 18:00:27,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-10-13 18:00:27,009 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:27,009 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:27,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:27,220 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:27,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1046680151, now seen corresponding path program 1 times [2019-10-13 18:00:27,221 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:27,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203923552] [2019-10-13 18:00:27,221 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:27,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:27,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:27,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203923552] [2019-10-13 18:00:27,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430805338] [2019-10-13 18:00:27,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:27,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:27,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:00:27,703 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:27,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 18:00:27,704 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949511082] [2019-10-13 18:00:27,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:27,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:27,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:27,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:00:27,705 INFO L87 Difference]: Start difference. First operand 3942 states and 5187 transitions. Second operand 3 states. [2019-10-13 18:00:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:28,826 INFO L93 Difference]: Finished difference Result 10166 states and 13770 transitions. [2019-10-13 18:00:28,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:28,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 204 [2019-10-13 18:00:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:28,856 INFO L225 Difference]: With dead ends: 10166 [2019-10-13 18:00:28,856 INFO L226 Difference]: Without dead ends: 6230 [2019-10-13 18:00:28,867 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:00:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6230 states. [2019-10-13 18:00:29,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6230 to 6228. [2019-10-13 18:00:29,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6228 states. [2019-10-13 18:00:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 8045 transitions. [2019-10-13 18:00:29,024 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 8045 transitions. Word has length 204 [2019-10-13 18:00:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:29,025 INFO L462 AbstractCegarLoop]: Abstraction has 6228 states and 8045 transitions. [2019-10-13 18:00:29,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 8045 transitions. [2019-10-13 18:00:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-10-13 18:00:29,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:29,032 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:29,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:29,246 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:29,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1919024346, now seen corresponding path program 1 times [2019-10-13 18:00:29,247 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:29,247 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646218258] [2019-10-13 18:00:29,247 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:29,247 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:29,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:00:29,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646218258] [2019-10-13 18:00:29,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701998770] [2019-10-13 18:00:29,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:29,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:29,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:00:29,774 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:29,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-13 18:00:29,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832224066] [2019-10-13 18:00:29,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:29,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:29,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:29,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:29,778 INFO L87 Difference]: Start difference. First operand 6228 states and 8045 transitions. Second operand 3 states. [2019-10-13 18:00:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:30,895 INFO L93 Difference]: Finished difference Result 14922 states and 19845 transitions. [2019-10-13 18:00:30,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:30,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 209 [2019-10-13 18:00:30,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:30,950 INFO L225 Difference]: With dead ends: 14922 [2019-10-13 18:00:30,950 INFO L226 Difference]: Without dead ends: 8700 [2019-10-13 18:00:30,965 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8700 states. [2019-10-13 18:00:31,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8700 to 8324. [2019-10-13 18:00:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8324 states. [2019-10-13 18:00:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8324 states to 8324 states and 10737 transitions. [2019-10-13 18:00:31,136 INFO L78 Accepts]: Start accepts. Automaton has 8324 states and 10737 transitions. Word has length 209 [2019-10-13 18:00:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:31,136 INFO L462 AbstractCegarLoop]: Abstraction has 8324 states and 10737 transitions. [2019-10-13 18:00:31,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:31,137 INFO L276 IsEmpty]: Start isEmpty. Operand 8324 states and 10737 transitions. [2019-10-13 18:00:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-13 18:00:31,145 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:31,145 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:31,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:31,356 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:31,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:31,357 INFO L82 PathProgramCache]: Analyzing trace with hash 259131254, now seen corresponding path program 1 times [2019-10-13 18:00:31,357 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:31,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151445578] [2019-10-13 18:00:31,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:31,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:31,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:00:31,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151445578] [2019-10-13 18:00:31,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80969956] [2019-10-13 18:00:31,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:31,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:31,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:00:31,782 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:31,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-13 18:00:31,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393480643] [2019-10-13 18:00:31,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:31,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:31,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:31,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:00:31,784 INFO L87 Difference]: Start difference. First operand 8324 states and 10737 transitions. Second operand 3 states. [2019-10-13 18:00:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:33,134 INFO L93 Difference]: Finished difference Result 17783 states and 23283 transitions. [2019-10-13 18:00:33,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:33,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2019-10-13 18:00:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:33,180 INFO L225 Difference]: With dead ends: 17783 [2019-10-13 18:00:33,181 INFO L226 Difference]: Without dead ends: 9465 [2019-10-13 18:00:33,203 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 242 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:00:33,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9465 states. [2019-10-13 18:00:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9465 to 9465. [2019-10-13 18:00:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9465 states. [2019-10-13 18:00:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9465 states to 9465 states and 12231 transitions. [2019-10-13 18:00:33,520 INFO L78 Accepts]: Start accepts. Automaton has 9465 states and 12231 transitions. Word has length 237 [2019-10-13 18:00:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:33,520 INFO L462 AbstractCegarLoop]: Abstraction has 9465 states and 12231 transitions. [2019-10-13 18:00:33,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 9465 states and 12231 transitions. [2019-10-13 18:00:33,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-13 18:00:33,532 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:33,533 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:33,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:33,746 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:33,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1903102919, now seen corresponding path program 1 times [2019-10-13 18:00:33,747 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:33,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115756951] [2019-10-13 18:00:33,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:33,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:33,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:34,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115756951] [2019-10-13 18:00:34,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928049916] [2019-10-13 18:00:34,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:34,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 18:00:34,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:34,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:34,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:34,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:34,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:34,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:34,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:34,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:34,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:34,744 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:00:34,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-10-13 18:00:34,745 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758874754] [2019-10-13 18:00:34,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 18:00:34,749 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:34,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 18:00:34,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:00:34,750 INFO L87 Difference]: Start difference. First operand 9465 states and 12231 transitions. Second operand 13 states. [2019-10-13 18:00:39,132 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2019-10-13 18:00:39,604 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2019-10-13 18:00:41,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:41,525 INFO L93 Difference]: Finished difference Result 19308 states and 25814 transitions. [2019-10-13 18:00:41,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-13 18:00:41,526 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 244 [2019-10-13 18:00:41,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:41,568 INFO L225 Difference]: With dead ends: 19308 [2019-10-13 18:00:41,568 INFO L226 Difference]: Without dead ends: 9655 [2019-10-13 18:00:41,589 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=466, Invalid=1886, Unknown=0, NotChecked=0, Total=2352 [2019-10-13 18:00:41,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9655 states. [2019-10-13 18:00:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9655 to 8773. [2019-10-13 18:00:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8773 states. [2019-10-13 18:00:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8773 states to 8773 states and 10618 transitions. [2019-10-13 18:00:41,816 INFO L78 Accepts]: Start accepts. Automaton has 8773 states and 10618 transitions. Word has length 244 [2019-10-13 18:00:41,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:41,817 INFO L462 AbstractCegarLoop]: Abstraction has 8773 states and 10618 transitions. [2019-10-13 18:00:41,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 18:00:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 8773 states and 10618 transitions. [2019-10-13 18:00:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2019-10-13 18:00:41,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:41,833 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, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 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 18:00:42,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:42,038 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:42,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1030527620, now seen corresponding path program 1 times [2019-10-13 18:00:42,039 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:42,039 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250916473] [2019-10-13 18:00:42,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:42,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:42,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY